



Independent Submission                                           C. Hood
Internet-Draft                                             Nomotic, Inc.
Intended status: Informational                             16 April 2026
Expires: 18 October 2026


                AGTP Standard Extended Method Vocabulary
                  draft-hood-agtp-standard-methods-01

Abstract

   The Agent Transfer Protocol (AGTP) defines a core method vocabulary
   (Tier 1) of twelve intent-based methods covering the most common
   agent operations.  This document defines the Tier 2 Standard Extended
   Method Vocabulary: methods registered in the IANA AGTP Method
   Registry that are available for use in any AGTP implementation but
   are not required for baseline compliance.  Methods are organized into
   six categories reflecting the full operational range of AI agent
   systems: ACQUIRE, COMPUTE, TRANSACT, INTEGRATE, COMMUNICATE, and
   ORCHESTRATE.  This document also specifies the QUOTE method
   referenced in the AGTP core specification for pre-flight resource
   cost estimation.  The six-category taxonomy is aligned with the
   ACTION framework described in [AGENTIC-API].

   All methods defined in this document conform to the Agentic Grammar
   and Interface Specification (AGIS) [AGIS].  Each method satisfies the
   AGIS action-intent semantic class requirement and syntactic rules.
   This document serves as a reference vocabulary of AGIS-conformant
   methods for organizations seeking maximum cross-system
   interoperability.  Organizations requiring domain-specific
   vocabularies not covered here may define their own AGIS-conformant
   methods without IANA registration using the Tier 4 grammar-based
   validation pathway defined in [AGTP].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   material or to cite them other than as "work in progress."



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   This Internet-Draft will expire on 18 October 2026.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Empirical Justification . . . . . . . . . . . . . . . . .   4
     1.3.  Taxonomy  . . . . . . . . . . . . . . . . . . . . . . . .   5
     1.4.  Method Registration . . . . . . . . . . . . . . . . . . .   6
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  ACQUIRE Category Methods  . . . . . . . . . . . . . . . . . .   7
     3.1.  FETCH . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     3.2.  SEARCH  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     3.3.  SCAN  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.4.  PULL  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.5.  FIND  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
     3.6.  ANALYZE . . . . . . . . . . . . . . . . . . . . . . . . .  11
   4.  COMPUTE Category Methods  . . . . . . . . . . . . . . . . . .  11
     4.1.  EXTRACT . . . . . . . . . . . . . . . . . . . . . . . . .  11
     4.2.  FILTER  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     4.3.  VALIDATE  . . . . . . . . . . . . . . . . . . . . . . . .  13
     4.4.  TRANSFORM . . . . . . . . . . . . . . . . . . . . . . . .  13
     4.5.  TRANSLATE . . . . . . . . . . . . . . . . . . . . . . . .  14
     4.6.  NORMALIZE . . . . . . . . . . . . . . . . . . . . . . . .  14
     4.7.  PREDICT . . . . . . . . . . . . . . . . . . . . . . . . .  15
     4.8.  RANK  . . . . . . . . . . . . . . . . . . . . . . . . . .  16
     4.9.  CLASSIFY  . . . . . . . . . . . . . . . . . . . . . . . .  16
     4.10. CALCULATE . . . . . . . . . . . . . . . . . . . . . . . .  17
     4.11. EVALUATE  . . . . . . . . . . . . . . . . . . . . . . . .  18
     4.12. GENERATE  . . . . . . . . . . . . . . . . . . . . . . . .  18
     4.13. RECOMMEND . . . . . . . . . . . . . . . . . . . . . . . .  19
   5.  TRANSACT Category Methods . . . . . . . . . . . . . . . . . .  20
     5.1.  QUOTE . . . . . . . . . . . . . . . . . . . . . . . . . .  20
     5.2.  REGISTER  . . . . . . . . . . . . . . . . . . . . . . . .  21
     5.3.  SUBMIT  . . . . . . . . . . . . . . . . . . . . . . . . .  22
     5.4.  AUTHORIZE . . . . . . . . . . . . . . . . . . . . . . . .  22
     5.5.  CANCEL  . . . . . . . . . . . . . . . . . . . . . . . . .  23



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     5.6.  TRANSFER  . . . . . . . . . . . . . . . . . . . . . . . .  24
     5.7.  PURCHASE  . . . . . . . . . . . . . . . . . . . . . . . .  25
     5.8.  SIGN  . . . . . . . . . . . . . . . . . . . . . . . . . .  25
     5.9.  LOG . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
     5.10. PUBLISH . . . . . . . . . . . . . . . . . . . . . . . . .  26
   6.  INTEGRATE Category Methods  . . . . . . . . . . . . . . . . .  27
     6.1.  MERGE . . . . . . . . . . . . . . . . . . . . . . . . . .  27
     6.2.  LINK  . . . . . . . . . . . . . . . . . . . . . . . . . .  28
     6.3.  SYNC  . . . . . . . . . . . . . . . . . . . . . . . . . .  29
     6.4.  IMPORT  . . . . . . . . . . . . . . . . . . . . . . . . .  29
     6.5.  MAP . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
     6.6.  CONNECT . . . . . . . . . . . . . . . . . . . . . . . . .  31
     6.7.  EMBED . . . . . . . . . . . . . . . . . . . . . . . . . .  31
   7.  COMMUNICATE Category Methods  . . . . . . . . . . . . . . . .  32
     7.1.  ALERT . . . . . . . . . . . . . . . . . . . . . . . . . .  32
     7.2.  BROADCAST . . . . . . . . . . . . . . . . . . . . . . . .  33
     7.3.  REPLY . . . . . . . . . . . . . . . . . . . . . . . . . .  34
     7.4.  SEND  . . . . . . . . . . . . . . . . . . . . . . . . . .  35
     7.5.  REPORT  . . . . . . . . . . . . . . . . . . . . . . . . .  35
   8.  ORCHESTRATE Category Methods  . . . . . . . . . . . . . . . .  36
     8.1.  CHAIN . . . . . . . . . . . . . . . . . . . . . . . . . .  36
     8.2.  BATCH . . . . . . . . . . . . . . . . . . . . . . . . . .  37
     8.3.  MONITOR . . . . . . . . . . . . . . . . . . . . . . . . .  38
     8.4.  ROUTE . . . . . . . . . . . . . . . . . . . . . . . . . .  38
     8.5.  RETRY . . . . . . . . . . . . . . . . . . . . . . . . . .  39
     8.6.  PAUSE . . . . . . . . . . . . . . . . . . . . . . . . . .  40
     8.7.  RESUME  . . . . . . . . . . . . . . . . . . . . . . . . .  40
     8.8.  RUN . . . . . . . . . . . . . . . . . . . . . . . . . . .  41
     8.9.  CHECK . . . . . . . . . . . . . . . . . . . . . . . . . .  41
   9.  Method Summary  . . . . . . . . . . . . . . . . . . . . . . .  42
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  44
     10.1.  PURCHASE Authorization . . . . . . . . . . . . . . . . .  44
     10.2.  AUTHORIZE Scope Constraint . . . . . . . . . . . . . . .  45
     10.3.  RUN Method Safety  . . . . . . . . . . . . . . . . . . .  45
     10.4.  GENERATE Code Output Safety  . . . . . . . . . . . . . .  45
     10.5.  MONITOR Callback Verification  . . . . . . . . . . . . .  45
     10.6.  TRANSFER and Ownership Chain Integrity . . . . . . . . .  45
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  45
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  50
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  51
     12.2.  Informative References . . . . . . . . . . . . . . . . .  51
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  51

1.  Introduction







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1.1.  Motivation

   The AGTP core specification deliberately limits its Tier 1 method set
   to twelve methods that represent the universal operations of AI agent
   systems: data retrieval, content synthesis, resource booking,
   scheduling, context management, delegation, collaboration,
   confirmation, escalation, notification, capability discovery, and
   session suspension.  This minimalist core enables broad baseline
   compliance without requiring implementations to support methods they
   do not need.

   Real-world agent deployments require a richer vocabulary.  An agent
   performing data analysis needs ANALYZE, CLASSIFY, and EVALUATE.  An
   agent connecting enterprise systems needs SYNC, MERGE, and CONNECT.
   An agent managing complex workflows needs CHAIN, BATCH, and RUN.  An
   agent executing commercial operations needs AUTHORIZE, CANCEL, and
   PURCHASE.  These operations are well-defined, widely needed, and
   deserve standardized method names, but they are not universal enough
   to belong in the Tier 1 core.

   This document defines the Tier 2 Standard Extended Method Vocabulary:
   a registered set of methods available to any AGTP implementation.
   Tier 2 methods are not required for AGTP compliance but *SHOULD* be
   implemented where their semantics apply.

   All methods in this document are defined instances of the action-
   intent semantic class standardized in the Agentic Grammar and
   Interface Specification [AGIS].  The AGIS grammar provides the
   governing rules under which these methods are valid.  Organizations
   that require domain-specific methods beyond this vocabulary may
   define their own AGIS-conformant verbs using the Tier 4 grammar-based
   validation pathway in [AGTP], without requiring IANA registration,
   provided their methods satisfy the AGIS syntactic and semantic class
   constraints.

1.2.  Empirical Justification

   Agent Transfer Protocol is motivated by measured agent performance
   gains.  Independent benchmarking (4,800 trials across Claude, Grok,
   and OpenAI-family models) compared pure CRUD endpoints against a
   mixed catalog containing both CRUD and the semantic verbs defined in
   this vocabulary.

   In mixed-paradigm conditions (Tier 1 CRUD + optional Tier 2 semantic
   methods), agentic verbs improved exact-match accuracy by 10–29
   percentage points depending on model family (Claude +29 pp, Grok +18
   pp, OpenAI +10 pp; all p<0.001).  Parameter fidelity and
   clarification rate also improved.



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   A description-swap ablation (J1/J2) isolated the mechanism: when CRUD
   paths received agentic-style descriptions, performance collapsed
   dramatically on weaker models (Grok -39 pp, OpenAI -43 pp).  When
   agentic paths received CRUD-style descriptions, performance held
   nearly flat on Claude and degraded far less on other models.  This
   demonstrates that *semantic method names encode intent more
   resiliently* than REST-style generics, even when documentation
   quality varies — precisely the scenario Tier 2 methods are designed
   to address.

   Two-stage discovery (as required by AGTP session establishment)
   incurs a modest cost (12–17 pp) but does not erase the net gain.  The
   QUOTE method and Supported-Methods header further reduce unnecessary
   invocations.

   These results validate the tiered design: Tier 1 provides the
   operational simplicity developers require, while the registered Tier
   2 vocabulary delivers measurable agent performance and resilience.
   Implementations are encouraged to adopt Tier 2 methods where their
   domain semantics align.

1.3.  Taxonomy

   Methods are organized into six categories.  Each category has a
   distinct operational character:

   ACQUIRE:  Retrieve data, resources, or state without modifying it.
      Agents observe, locate, and extract information.

   COMPUTE:  Process or transform information to produce a derived
      result.  Agents analyze, classify, summarize, and generate
      outputs.

   TRANSACT:  Execute operations that alter system state or complete an
      external commitment.  Agents book, purchase, authorize, and
      register.

   INTEGRATE:  Connect, synchronize, or unify data and services across
      system boundaries.  Agents merge, link, sync, and map across
      silos.

   COMMUNICATE:  Deliver signals, messages, or structured outputs to
      recipients.  Agents notify, alert, broadcast, and reply.

   ORCHESTRATE:  Coordinate, sequence, and manage workflows across
      tasks, agents, and time.  Agents chain, batch, route, and
      schedule.




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   The category taxonomy aligns with the ACTION framework defined in
   [AGENTIC-API].  The INTEGRATE category is the key distinction from
   simpler models: cross-system unification operations are neither
   transactions (no external commitment) nor computations (no
   transformation of content into a new analytical form).  They are
   connective operations with distinct failure modes, conflict policies,
   and reversibility characteristics.

1.4.  Method Registration

   All methods in this document are registered in the IANA AGTP Method
   Registry per the registration procedure defined in [AGTP]
   Section 9.2.  Implementations *MUST* list supported Tier 2 methods in
   the Supported-Methods response header at session establishment.
   Clients *SHOULD* query this header before invoking Tier 2 methods.

   All methods defined in this document have been validated against the
   AGIS Grammar Specification [AGIS] and satisfy the following
   requirements:

   1.  Each method is a single uppercase alphabetic token in imperative
       base form (e.g., FETCH, not FETCHING or FETCHED).

   2.  Each method belongs to the action-intent semantic class: it
       expresses an operation the caller intends to be performed on
       their behalf.

   3.  No method duplicates a prohibited HTTP method name (GET, POST,
       PUT, DELETE, PATCH, HEAD, OPTIONS, CONNECT, TRACE).

   4.  Each method is accompanied by a semantic declaration sufficient
       for agent natural language inference, as required by [AGIS]
       Section 6.

   The AGIS semantic class constraint is the normative basis for the
   "semantic uniqueness" review criterion applied by the Designated
   Expert during Tier 2 registration.  A proposed method that describes
   a state or condition rather than an action-intent (e.g., AVAILABLE,
   ACTIVE) fails the semantic class requirement and *MUST* be rejected.

2.  Terminology

   The key words "*MUST*", "*MUST NOT*", "*REQUIRED*", "*SHALL*",
   "*SHALL NOT*", "*SHOULD*", "*SHOULD NOT*", "*RECOMMENDED*", "*NOT
   RECOMMENDED*", "*MAY*", and "*OPTIONAL*" in this document are to be
   interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only
   when, they appear in all capitals.




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   Tier 1 Method:  A core AGTP method defined in [AGTP] Section 7.2,
      required for baseline AGTP compliance.

   Tier 2 Method:  A standard extended AGTP method defined in this
      document, registered in the IANA AGTP Method Registry, available
      to any implementation but not required for baseline compliance.

   Idempotent:  A method is idempotent if multiple identical invocations
      produce the same result as a single invocation.  Non-idempotent
      methods *MUST NOT* be retried without explicit application-layer
      handling.

   Action-Intent Verb:  A verb belonging to the semantic class required
      by [AGIS] for all AGTP method identifiers.  An action-intent verb
      expresses an operation the caller intends to be performed on their
      behalf, in imperative base form.  All methods defined in this
      document are action-intent verbs.

   AGIS-Conformant Method:  A method identifier that satisfies all
      syntactic and semantic class requirements of the AGIS Grammar
      Specification [AGIS].  All Tier 1 and Tier 2 registered methods
      are AGIS-conformant.  Organizations may also define AGIS-
      conformant methods outside this registry using the Tier 4 grammar-
      based validation pathway in [AGTP].

   Reference Vocabulary:  The collection of Tier 1 and Tier 2 AGTP
      registered methods, which serve as recommended AGIS-conformant
      vocabulary for common agent operations.  Use of the reference
      vocabulary maximizes cross-system interoperability.  Domain-
      specific operations not covered by the reference vocabulary may be
      expressed using Tier 4 custom methods.

3.  ACQUIRE Category Methods

   ACQUIRE methods retrieve data, resources, or state without modifying
   it.  Agents use ACQUIRE methods to observe, locate, and extract
   information from internal or external sources.  All ACQUIRE methods
   are idempotent unless noted.

3.1.  FETCH

   Purpose: Retrieve a specific resource by identifier.  Distinguished
   from QUERY (which expresses an information need without specifying a
   location) by targeting a known resource at a known address.

   Use case: An agent retrieves the current version of a contract
   document by its document ID before passing it to ANALYZE.




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       +===================+==========+============================+
       | Parameter         | Required | Description                |
       +===================+==========+============================+
       | resource_id       | *MUST*   | Identifier or URI of the   |
       |                   |          | resource to retrieve       |
       +-------------------+----------+----------------------------+
       | format            | *MAY*    | Requested response format  |
       +-------------------+----------+----------------------------+
       | version           | *MAY*    | Specific version of the    |
       |                   |          | resource to retrieve       |
       +-------------------+----------+----------------------------+
       | if_modified_since | *MAY*    | ISO 8601 timestamp; return |
       |                   |          | only if modified after     |
       +-------------------+----------+----------------------------+

                         Table 1: FETCH Parameters

   Response: Resource content with metadata.  Idempotent: Yes. Error
   codes: 404, 403, 408.

3.2.  SEARCH

   Purpose: Execute a structured search query against a data source and
   return matching results.  Distinguished from QUERY by accepting
   structured query syntax (field filters, range constraints, sort
   order) rather than natural language intent.

   Use case: An agent locates all purchase orders above $50,000 in
   pending status, sorted by submission date.

          +===========+==========+=============================+
          | Parameter | Required | Description                 |
          +===========+==========+=============================+
          | query     | *MUST*   | Structured query expression |
          |           |          | or filter object            |
          +-----------+----------+-----------------------------+
          | scope     | *SHOULD* | Data sources or indices to  |
          |           |          | search                      |
          +-----------+----------+-----------------------------+
          | limit     | *MAY*    | Maximum number of results   |
          |           |          | to return                   |
          +-----------+----------+-----------------------------+
          | offset    | *MAY*    | Pagination offset           |
          +-----------+----------+-----------------------------+
          | sort      | *MAY*    | Sort field and order        |
          +-----------+----------+-----------------------------+

                        Table 2: SEARCH Parameters



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   Response: Result set with pagination metadata.  Idempotent: Yes.
   Error codes: 400, 422.

3.3.  SCAN

   Purpose: Enumerate or iterate over a collection of resources,
   potentially applying lightweight filters.  Distinguished from SEARCH
   by prioritizing completeness over relevance ranking.

   Use case: An agent audits all agents in a governance zone by
   iterating over the full registry, page by page, to build a compliance
   report.

     +============+==========+======================================+
     | Parameter  | Required | Description                          |
     +============+==========+======================================+
     | collection | *MUST*   | Identifier of the collection to scan |
     +------------+----------+--------------------------------------+
     | filter     | *MAY*    | Simple filter criteria               |
     +------------+----------+--------------------------------------+
     | cursor     | *MAY*    | Continuation cursor from a prior     |
     |            |          | SCAN response                        |
     +------------+----------+--------------------------------------+
     | page_size  | *MAY*    | Number of items to return per page   |
     +------------+----------+--------------------------------------+

                         Table 3: SCAN Parameters

   Response: Page of results with continuation cursor if more items
   remain.  Idempotent: Yes. Error codes: 404, 408.

3.4.  PULL

   Purpose: Retrieve pending items from a queue or stream.  Consumes
   items from the source; the agent takes ownership of pulled items.

   Use case: An order-processing agent pulls the next batch of
   unprocessed orders from the fulfillment queue to begin packing
   instructions.












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    +====================+==========+=================================+
    | Parameter          | Required | Description                     |
    +====================+==========+=================================+
    | source             | *MUST*   | Queue or stream identifier      |
    +--------------------+----------+---------------------------------+
    | max_items          | *MAY*    | Maximum number of items to pull |
    +--------------------+----------+---------------------------------+
    | visibility_timeout | *MAY*    | Seconds for which pulled items  |
    |                    |          | are hidden from other consumers |
    +--------------------+----------+---------------------------------+

                          Table 4: PULL Parameters

   Response: List of pulled items with item IDs for acknowledgment.
   Idempotent: No.  Error codes: 404, 409.

3.5.  FIND

   Purpose: Locate an agent, resource, or entity matching specified
   criteria.  Distinguished from SEARCH by targeting agent or entity
   discovery rather than content retrieval.

   Use case: An orchestrator locates all available analyst agents in the
   partner governance zone that support the VALIDATE method.

   +===========+==========+============================================+
   | Parameter | Required | Description                                |
   +===========+==========+============================================+
   | criteria  | *MUST*   | Structured criteria                        |
   |           |          | for the entity to find                     |
   +-----------+----------+--------------------------------------------+
   | namespace | *SHOULD* | Registry or namespace                      |
   |           |          | to search within                           |
   +-----------+----------+--------------------------------------------+
   | limit     | *MAY*    | Maximum results to                         |
   |           |          | return                                     |
   +-----------+----------+--------------------------------------------+

                          Table 5: FIND Parameters

   Response: List of matching entities with identifiers and metadata.
   Idempotent: Yes. Error codes: 404, 422.









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3.6.  ANALYZE

   Purpose: Perform observational analysis or pattern detection on a
   dataset or system state.  Distinguished from COMPUTE methods such as
   SUMMARIZE or CLASSIFY by returning findings, patterns, and anomalies
   rather than transforming the input.  ANALYZE does not modify state.

   Use case: An agent detects anomalous spending patterns in a quarterly
   expense dataset by analyzing transaction frequency and amount
   distributions against historical baselines.

       +===============+==========+===============================+
       | Parameter     | Required | Description                   |
       +===============+==========+===============================+
       | target        | *MUST*   | Dataset, system identifier,   |
       |               |          | or inline data to analyze     |
       +---------------+----------+-------------------------------+
       | analysis_type | *SHOULD* | Pattern type: anomaly, trend, |
       |               |          | distribution, correlation     |
       +---------------+----------+-------------------------------+
       | time_range    | *MAY*    | ISO 8601 time window for      |
       |               |          | time-series data              |
       +---------------+----------+-------------------------------+
       | sensitivity   | *MAY*    | Detection sensitivity         |
       |               |          | threshold (0.0-1.0)           |
       +---------------+----------+-------------------------------+
       | explain       | *MAY*    | If true, include reasoning    |
       |               |          | behind each finding           |
       +---------------+----------+-------------------------------+

                       Table 6: ANALYZE Parameters

   Response: Findings document with detected patterns, anomaly
   indicators, and confidence scores per finding.  Idempotent: Yes.
   Error codes: 400, 422, 503.

4.  COMPUTE Category Methods

   COMPUTE methods process or transform information to produce a derived
   result.  Agents use COMPUTE methods to analyze, classify, summarize,
   and generate outputs from existing inputs.  COMPUTE methods are
   typically idempotent given the same input.

4.1.  EXTRACT

   Purpose: Pull structured information from unstructured or semi-
   structured source content.




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   Use case: An agent extracts party names, dates, and obligation
   clauses from an unstructured legal contract into a structured JSON
   schema.

       +======================+==========+=========================+
       | Parameter            | Required | Description             |
       +======================+==========+=========================+
       | source               | *MUST*   | Content to extract from |
       +----------------------+----------+-------------------------+
       | schema               | *MUST*   | Target structure for    |
       |                      |          | extracted data          |
       +----------------------+----------+-------------------------+
       | confidence_threshold | *MAY*    | Minimum confidence for  |
       |                      |          | included extractions    |
       +----------------------+----------+-------------------------+

                        Table 7: EXTRACT Parameters

   Response: Extracted data conforming to the declared schema, with
   confidence scores per field.  Idempotent: Yes. Error codes: 400, 422.

4.2.  FILTER

   Purpose: Apply criteria to a dataset and return only matching
   records.

   Use case: An agent filters a product catalog to items that are in-
   stock, priced under $200, and tagged with a specific category.

          +===============+==========+==========================+
          | Parameter     | Required | Description              |
          +===============+==========+==========================+
          | data          | *MUST*   | Dataset to filter        |
          |               |          | (inline or by reference) |
          +---------------+----------+--------------------------+
          | criteria      | *MUST*   | Filter expression        |
          +---------------+----------+--------------------------+
          | output_format | *MAY*    | Format for filtered      |
          |               |          | results                  |
          +---------------+----------+--------------------------+

                         Table 8: FILTER Parameters

   Response: Filtered dataset.  Idempotent: Yes. Error codes: 400, 422.







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4.3.  VALIDATE

   Purpose: Check input data, a document, or a proposed action against a
   schema, policy, or rule set.  Returns validation results but does not
   modify state.

   Use case: An agent validates an invoice payload against the accounts
   payable schema and business rules before submitting it for payment.

     +===========+==========+========================================+
     | Parameter | Required | Description                            |
     +===========+==========+========================================+
     | target    | *MUST*   | Data, document, or action to validate  |
     +-----------+----------+----------------------------------------+
     | schema    | *SHOULD* | Schema or rule set to validate against |
     +-----------+----------+----------------------------------------+
     | strict    | *MAY*    | If true, treat warnings as failures    |
     +-----------+----------+----------------------------------------+

                        Table 9: VALIDATE Parameters

   Response: Validation result with pass/fail status, errors, and
   warnings.  Idempotent: Yes. Error codes: 400, 422.

4.4.  TRANSFORM

   Purpose: Convert data from one format, schema, or structure to
   another.

   Use case: An agent converts a vendor's proprietary order payload into
   the internal canonical order schema before routing to fulfillment.

      +===============+==========+=================================+
      | Parameter     | Required | Description                     |
      +===============+==========+=================================+
      | source        | *MUST*   | Data to transform               |
      +---------------+----------+---------------------------------+
      | source_format | *SHOULD* | Format of the input data        |
      +---------------+----------+---------------------------------+
      | target_format | *MUST*   | Desired output format or schema |
      +---------------+----------+---------------------------------+
      | mapping       | *MAY*    | Field mapping specification     |
      +---------------+----------+---------------------------------+

                      Table 10: TRANSFORM Parameters

   Response: Transformed data in the target format.  Idempotent: Yes.
   Error codes: 400, 422.



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4.5.  TRANSLATE

   Purpose: Convert content between human languages.

   Use case: An agent translates product descriptions from English into
   French and German to prepare a multilingual catalog update.

         +=================+==========+=========================+
         | Parameter       | Required | Description             |
         +=================+==========+=========================+
         | content         | *MUST*   | Text or structured      |
         |                 |          | content to translate    |
         +-----------------+----------+-------------------------+
         | source_language | *SHOULD* | BCP 47 language tag;    |
         |                 |          | auto-detected if absent |
         +-----------------+----------+-------------------------+
         | target_language | *MUST*   | BCP 47 language tag of  |
         |                 |          | desired output          |
         +-----------------+----------+-------------------------+
         | formality       | *MAY*    | formal or informal      |
         +-----------------+----------+-------------------------+

                      Table 11: TRANSLATE Parameters

   Response: Translated content with source and target language codes.
   Idempotent: Yes. Error codes: 400, 422.

4.6.  NORMALIZE

   Purpose: Standardize data values to a canonical form (dates, phone
   numbers, addresses, currency amounts, units).

   Use case: An agent normalizes customer records ingested from three
   regional CRMs using different date formats, phone conventions, and
   address schemas into a unified canonical format.
















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         +===========+==========+================================+
         | Parameter | Required | Description                    |
         +===========+==========+================================+
         | data      | *MUST*   | Data to normalize              |
         +-----------+----------+--------------------------------+
         | type      | *MUST*   | Normalization type: date,      |
         |           |          | phone, address, currency, unit |
         +-----------+----------+--------------------------------+
         | locale    | *MAY*    | Locale context for             |
         |           |          | normalization                  |
         +-----------+----------+--------------------------------+

                       Table 12: NORMALIZE Parameters

   Response: Normalized data with original and canonical forms.
   Idempotent: Yes. Error codes: 400, 422.

4.7.  PREDICT

   Purpose: Apply a model or function to input data and return a
   predicted output or probability estimate.

   Use case: An agent predicts the likelihood of customer churn for each
   account in a segment, returning probability scores and top
   contributing factors for accounts above the risk threshold.

     +==================+==========+================================+
     | Parameter        | Required | Description                    |
     +==================+==========+================================+
     | input            | *MUST*   | Input data for the prediction  |
     +------------------+----------+--------------------------------+
     | model_id         | *SHOULD* | Identifier of the model to use |
     +------------------+----------+--------------------------------+
     | confidence_floor | *MAY*    | Minimum confidence required to |
     |                  |          | return a result                |
     +------------------+----------+--------------------------------+
     | explain          | *MAY*    | If true, include feature       |
     |                  |          | attribution in response        |
     +------------------+----------+--------------------------------+

                       Table 13: PREDICT Parameters

   Response: Prediction result with confidence score and optional
   explanation.  Idempotent: Yes. Error codes: 400, 422, 503.







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4.8.  RANK

   Purpose: Sort or score a set of items by relevance, quality, or a
   declared criterion.

   Use case: An agent ranks a shortlist of job candidates by predicted
   role fit, ordering them for recruiter review.

     +===========+==========+=======================================+
     | Parameter | Required | Description                           |
     +===========+==========+=======================================+
     | items     | *MUST*   | List of items to rank                 |
     +-----------+----------+---------------------------------------+
     | criterion | *MUST*   | Ranking criterion or scoring function |
     +-----------+----------+---------------------------------------+
     | limit     | *MAY*    | Return only the top-N items           |
     +-----------+----------+---------------------------------------+

                        Table 14: RANK Parameters

   Response: Ranked list with scores per item.  Idempotent: Yes. Error
   codes: 400, 422.

4.9.  CLASSIFY

   Purpose: Assign one or more items to categories from a known
   classification scheme.  Distinguished from RANK (which scores and
   orders items) and PREDICT (which estimates future states) by
   assigning categorical labels to existing data.

   Use case: An agent classifies incoming support tickets into one of
   eight predefined categories to route them to the appropriate team.



















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     +======================+==========+=============================+
     | Parameter            | Required | Description                 |
     +======================+==========+=============================+
     | items                | *MUST*   | Items or data records to    |
     |                      |          | classify                    |
     +----------------------+----------+-----------------------------+
     | taxonomy             | *MUST*   | Classification scheme or    |
     |                      |          | label set to use            |
     +----------------------+----------+-----------------------------+
     | multi_label          | *MAY*    | If true, each item may      |
     |                      |          | receive more than one label |
     +----------------------+----------+-----------------------------+
     | confidence_threshold | *MAY*    | Minimum confidence for a    |
     |                      |          | label assignment            |
     +----------------------+----------+-----------------------------+

                       Table 15: CLASSIFY Parameters

   Response: Classification result with assigned labels and confidence
   scores per item.  Idempotent: Yes. Error codes: 400, 422.

4.10.  CALCULATE

   Purpose: Perform numeric, logical, or financial computations on
   structured inputs.  Distinguished from PREDICT (probabilistic) and
   EVALUATE (qualitative comparison) by operating on deterministic
   mathematical or rule-based logic.

   Use case: An agent calculates the total cost of a procurement order
   including applicable taxes, shipping fees, and bulk discount rules.

    +============+==========+=========================================+
    | Parameter  | Required | Description                             |
    +============+==========+=========================================+
    | expression | *MUST*   | Computation to perform, as a structured |
    |            |          | formula object or registered formula ID |
    +------------+----------+-----------------------------------------+
    | inputs     | *MUST*   | Named input values for the computation  |
    +------------+----------+-----------------------------------------+
    | precision  | *MAY*    | Number of decimal places in the result  |
    +------------+----------+-----------------------------------------+
    | currency   | *MAY*    | ISO 4217 currency code for financial    |
    |            |          | computations                            |
    +------------+----------+-----------------------------------------+

                       Table 16: CALCULATE Parameters





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   Response: Computation result with inputs echoed, formula applied, and
   output value.  Idempotent: Yes. Error codes: 400, 422.

4.11.  EVALUATE

   Purpose: Compare a target against benchmarks, rules, standards, or
   criteria and return a qualitative or scored assessment.
   Distinguished from VALIDATE (pass/fail against a schema) by returning
   a graded assessment with explanatory context.

   Use case: An agent evaluates a vendor proposal against a weighted
   scorecard covering price, delivery timeline, compliance posture, and
   references, returning a composite score and narrative rationale.

     +===========+==========+=======================================+
     | Parameter | Required | Description                           |
     +===========+==========+=======================================+
     | target    | *MUST*   | Item, document, or entity to evaluate |
     +-----------+----------+---------------------------------------+
     | criteria  | *MUST*   | Evaluation criteria or scorecard      |
     |           |          | definition                            |
     +-----------+----------+---------------------------------------+
     | weights   | *MAY*    | Relative weights for each criterion   |
     +-----------+----------+---------------------------------------+
     | rubric    | *MAY*    | Scoring rubric mapping values to      |
     |           |          | qualitative labels                    |
     +-----------+----------+---------------------------------------+

                      Table 17: EVALUATE Parameters

   Response: Evaluation result with per-criterion scores, composite
   score, and narrative rationale.  Idempotent: Yes. Error codes: 400,
   422.

4.12.  GENERATE

   Purpose: Produce textual, structured, or code output from a source
   specification, dataset, or prompt.  Distinguished from SUMMARIZE
   (which condenses existing content) by creating new content that did
   not exist in the source input.

   Use case: An agent generates API documentation from an OpenAPI
   specification, producing endpoint descriptions, parameter tables, and
   example payloads.







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        +=============+==========+===============================+
        | Parameter   | Required | Description                   |
        +=============+==========+===============================+
        | source      | *SHOULD* | Input specification, data, or |
        |             |          | context for generation        |
        +-------------+----------+-------------------------------+
        | output_type | *MUST*   | Type of output: text, code,   |
        |             |          | json, html, markdown          |
        +-------------+----------+-------------------------------+
        | format      | *MAY*    | Output format details (e.g.,  |
        |             |          | language for code generation) |
        +-------------+----------+-------------------------------+
        | length      | *MAY*    | Approximate target length or  |
        |             |          | size                          |
        +-------------+----------+-------------------------------+
        | style       | *MAY*    | Style guidance: formal,       |
        |             |          | casual, technical, neutral    |
        +-------------+----------+-------------------------------+

                      Table 18: GENERATE Parameters

   Security note: GENERATE with output_type: code *MUST* require human
   or governance review before passing to RUN.  Implementations
   providing a pipeline from GENERATE to RUN *MUST* insert an explicit
   VALIDATE or approval step between them.

   Response: Generated content with output_type field.  Idempotent: Yes
   (for identical inputs).  Error codes: 400, 422, 503.

4.13.  RECOMMEND

   Purpose: Generate a ranked list of suggestions, options, or actions
   tailored to a declared context, goal, and constraints.  Distinguished
   from RANK (which scores a provided list) by generating the candidate
   set itself based on the agent's understanding of the context.

   Use case: An agent recommends three product accessories to a customer
   based on their purchase history, stated budget, and current browsing
   context.












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        +=============+==========+================================+
        | Parameter   | Required | Description                    |
        +=============+==========+================================+
        | context     | *MUST*   | User, session, or situational  |
        |             |          | context for the recommendation |
        +-------------+----------+--------------------------------+
        | goal        | *MUST*   | What the recommendation is     |
        |             |          | optimizing for                 |
        +-------------+----------+--------------------------------+
        | constraints | *SHOULD* | Hard limits: budget, category, |
        |             |          | availability, exclusions       |
        +-------------+----------+--------------------------------+
        | limit       | *MAY*    | Maximum number of              |
        |             |          | recommendations to return      |
        +-------------+----------+--------------------------------+
        | explain     | *MAY*    | If true, include rationale for |
        |             |          | each recommendation            |
        +-------------+----------+--------------------------------+

                       Table 19: RECOMMEND Parameters

   Response: Ordered list of recommendations with scores, rationale, and
   confidence per item.  Idempotent: Yes. Error codes: 400, 422, 503.

5.  TRANSACT Category Methods

   TRANSACT methods perform state-changing operations with external
   systems, records, or commitments.  TRANSACT methods are not
   idempotent by default.

5.1.  QUOTE

   Purpose: Pre-flight cost estimation for a proposed method invocation.
   The requesting agent submits a proposed method call; the server
   returns a cost estimate without executing the method.  Servers
   supporting Budget-Limit *SHOULD* implement QUOTE.

   Use case: An agent estimates the token cost of a large-document
   SUMMARIZE operation before committing, to verify it stays within the
   session budget.











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         +==============+==========+=============================+
         | Parameter    | Required | Description                 |
         +==============+==========+=============================+
         | method       | *MUST*   | The AGTP method for which a |
         |              |          | cost estimate is requested  |
         +--------------+----------+-----------------------------+
         | parameters   | *MUST*   | The parameters that would   |
         |              |          | be passed to that method    |
         +--------------+----------+-----------------------------+
         | budget_units | *SHOULD* | Units in which to express   |
         |              |          | the estimate                |
         +--------------+----------+-----------------------------+

                         Table 20: QUOTE Parameters

   Response: Cost estimate in Cost-Estimate response header and response
   body, with confidence range.  Idempotent: Yes. Error codes: 400, 404,
   422.

   AGTP/1.0 200 OK
   Task-ID: task-quote-01
   Cost-Estimate: tokens=8500 compute-seconds=2.3
   Content-Type: application/agtp+json

   {
     "status": 200,
     "task_id": "task-quote-01",
     "result": {
       "method": "QUERY",
       "estimated_cost": {
         "tokens": {"min": 7200, "expected": 8500, "max": 11000},
         "compute_seconds": {"min": 1.8, "expected": 2.3, "max": 4.0}
       },
       "confidence": 0.82
     }
   }

5.2.  REGISTER

   Purpose: Create a new record, entity, or subscription in a target
   system.

   Use case: An onboarding agent registers a new employee in the
   identity management system, the access control system, and the
   payroll platform as three sequential REGISTER calls within a single
   session.





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        +=================+==========+============================+
        | Parameter       | Required | Description                |
        +=================+==========+============================+
        | entity_type     | *MUST*   | Type of entity to register |
        +-----------------+----------+----------------------------+
        | data            | *MUST*   | Registration data          |
        +-----------------+----------+----------------------------+
        | idempotency_key | *SHOULD* | Client-provided key for    |
        |                 |          | duplicate detection        |
        +-----------------+----------+----------------------------+

                       Table 21: REGISTER Parameters

   Response: Registration receipt with new entity identifier.
   Idempotent: No (use idempotency_key for safe retry).  Error codes:
   409, 422.

5.3.  SUBMIT

   Purpose: Deliver data, a document, or a work item to a processing
   system or queue for handling.

   Use case: An agent submits a completed expense report to the finance
   system's approval queue for human review.

    +===========+==========+=========================================+
    | Parameter | Required | Description                             |
    +===========+==========+=========================================+
    | target    | *MUST*   | Destination system or queue             |
    +-----------+----------+-----------------------------------------+
    | payload   | *MUST*   | Data or document to submit              |
    +-----------+----------+-----------------------------------------+
    | priority  | *MAY*    | Submission priority                     |
    +-----------+----------+-----------------------------------------+
    | callback  | *MAY*    | AGTP endpoint for delivery confirmation |
    +-----------+----------+-----------------------------------------+

                       Table 22: SUBMIT Parameters

   Response: Submission receipt with tracking identifier.  Idempotent:
   No.  Error codes: 400, 409, 503.

5.4.  AUTHORIZE

   Purpose: Approve permissions, credentials, or access for an entity,
   action, or resource.  Distinguished from VALIDATE (which checks
   conformance) by issuing an active grant rather than a check result.




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   Use case: An identity agent authorizes a contractor's access request
   for a restricted project repository, generating a scoped access token
   with a defined expiry.

           +============+==========+==========================+
           | Parameter  | Required | Description              |
           +============+==========+==========================+
           | subject    | *MUST*   | Agent-ID, principal, or  |
           |            |          | entity to authorize      |
           +------------+----------+--------------------------+
           | resource   | *MUST*   | Resource or action being |
           |            |          | authorized               |
           +------------+----------+--------------------------+
           | scope      | *MUST*   | Permissions being        |
           |            |          | granted                  |
           +------------+----------+--------------------------+
           | ttl        | *SHOULD* | Time-to-live for the     |
           |            |          | authorization in seconds |
           +------------+----------+--------------------------+
           | conditions | *MAY*    | Conditional constraints  |
           |            |          | on the authorization     |
           +------------+----------+--------------------------+

                      Table 23: AUTHORIZE Parameters

   Security note: AUTHORIZE *MUST* carry authorization:grant in the
   agent's Authority-Scope.  The granted scope *MUST NOT* exceed the
   authorizing agent's own declared scope (the anti-laundering
   constraint from [AGTP] Section 7.2.7 applies to all authorization
   grants). 451 Scope Violation *MUST* be returned if either constraint
   is violated.  Idempotent: No.  Error codes: 403, 409, 451.

5.5.  CANCEL

   Purpose: Revoke or reverse a previously scheduled or committed
   transaction.  Distinguished from lifecycle operations (agent
   suspension or revocation) by targeting a specific transaction,
   booking, or reservation rather than an agent's registry state.

   Use case: An agent cancels a conference room booking on behalf of the
   principal, releasing availability and notifying other attendees.










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     +================+==========+===================================+
     | Parameter      | Required | Description                       |
     +================+==========+===================================+
     | target_id      | *MUST*   | Identifier of the transaction,    |
     |                |          | booking, or reservation to cancel |
     +----------------+----------+-----------------------------------+
     | reason         | *SHOULD* | Structured cancellation reason    |
     +----------------+----------+-----------------------------------+
     | notify_parties | *MAY*    | If true, NOTIFY relevant parties  |
     |                |          | on cancellation                   |
     +----------------+----------+-----------------------------------+
     | refund_policy  | *MAY*    | Refund handling: full, partial,   |
     |                |          | none                              |
     +----------------+----------+-----------------------------------+

                        Table 24: CANCEL Parameters

   Response: Cancellation receipt with confirmation and any refund
   details.  Idempotent: No (cancellation of an already-cancelled item
   *SHOULD* return 409 Conflict).  Error codes: 404, 409, 422.

5.6.  TRANSFER

   Purpose: Move ownership or custody of a resource from one principal
   or agent to another.

   Use case: An agent transfers custodianship of a finalized contract to
   the legal archive system, removing it from the active working
   directory and updating ownership records.

           +================+==========+======================+
           | Parameter      | Required | Description          |
           +================+==========+======================+
           | resource_id    | *MUST*   | Resource to transfer |
           +----------------+----------+----------------------+
           | from_principal | *MUST*   | Current owner        |
           +----------------+----------+----------------------+
           | to_principal   | *MUST*   | New owner            |
           +----------------+----------+----------------------+
           | reason         | *SHOULD* | Reason for transfer  |
           +----------------+----------+----------------------+

                      Table 25: TRANSFER Parameters

   Security note: TRANSFER *MUST* verify that the requesting agent holds
   Authority-Scope for the resource type being transferred. 451 Scope
   Violation *MUST* be returned if not.  Idempotent: No.  Error codes:
   403, 404, 409, 451.



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5.7.  PURCHASE

   Purpose: Execute a financial transaction to acquire a resource,
   service, or allocation.

   Use case: A travel agent purchases a confirmed airline seat after the
   principal approves the itinerary, carrying the principal's payment
   method identifier.

   +=====================+==========+=================================+
   | Parameter           | Required | Description                     |
   +=====================+==========+=================================+
   | item                | *MUST*   | Item or service being purchased |
   +---------------------+----------+---------------------------------+
   | principal_id        | *MUST*   | Principal authorizing the       |
   |                     |          | purchase                        |
   +---------------------+----------+---------------------------------+
   | amount              | *MUST*   | Purchase amount and currency    |
   +---------------------+----------+---------------------------------+
   | payment_method      | *SHOULD* | Payment instrument identifier   |
   +---------------------+----------+---------------------------------+
   | confirm_immediately | *MAY*    | Boolean; if false, creates a    |
   |                     |          | hold                            |
   +---------------------+----------+---------------------------------+

                      Table 26: PURCHASE Parameters

   Security note: PURCHASE *MUST* carry payments:purchase in the agent's
   Authority-Scope. 451 Scope Violation *MUST* be returned if absent.
   PURCHASE *MUST* validate against the Budget-Limit header if present.
   Idempotent: No.  Error codes: 403, 409, 451, 452.

5.8.  SIGN

   Purpose: Apply a cryptographic signature to a document, assertion, or
   data artifact using the agent's or principal's signing key.

   Use case: An agent signs a finalized service agreement on behalf of
   the principal using the organization's governance key, producing a
   timestamped, non-repudiable signature record.











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      +===========+==========+======================================+
      | Parameter | Required | Description                          |
      +===========+==========+======================================+
      | payload   | *MUST*   | Data to sign                         |
      +-----------+----------+--------------------------------------+
      | key_id    | *SHOULD* | Identifier of the signing key to use |
      +-----------+----------+--------------------------------------+
      | algorithm | *MAY*    | Signature algorithm; defaults to     |
      |           |          | implementation default               |
      +-----------+----------+--------------------------------------+

                         Table 27: SIGN Parameters

   Response: Signed artifact with signature metadata.  Idempotent: No
   (signatures include timestamps).  Error codes: 403, 422.

5.9.  LOG

   Purpose: Write a structured record to an audit trail or operational
   log.  Agents *SHOULD* use LOG for governance-significant events
   rather than embedding log data in other method payloads.

   Use case: A financial agent logs each step of a multi-stage wire
   transfer approval workflow as discrete LOG events, creating an audit
   trail for compliance reporting.

     +================+==========+===================================+
     | Parameter      | Required | Description                       |
     +================+==========+===================================+
     | event_type     | *MUST*   | Structured event category         |
     +----------------+----------+-----------------------------------+
     | data           | *MUST*   | Event data                        |
     +----------------+----------+-----------------------------------+
     | severity       | *SHOULD* | info, warning, error, or critical |
     +----------------+----------+-----------------------------------+
     | correlation_id | *MAY*    | ID linking this event to a parent |
     |                |          | task or session                   |
     +----------------+----------+-----------------------------------+

                          Table 28: LOG Parameters

   Response: Log receipt with record identifier.  Idempotent: No.  Error
   codes: 400, 503.

5.10.  PUBLISH

   Purpose: Make content or data available to a defined audience or
   channel.



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   Use case: An agent publishes a finalized research summary to the
   organizational knowledge base, making it discoverable to all users
   with knowledge:read scope.

    +=============+==========+=======================================+
    | Parameter   | Required | Description                           |
    +=============+==========+=======================================+
    | content     | *MUST*   | Content to publish                    |
    +-------------+----------+---------------------------------------+
    | channel     | *MUST*   | Target channel or audience identifier |
    +-------------+----------+---------------------------------------+
    | format      | *SHOULD* | Content format                        |
    +-------------+----------+---------------------------------------+
    | schedule_at | *MAY*    | ISO 8601 timestamp for deferred       |
    |             |          | publication                           |
    +-------------+----------+---------------------------------------+

                       Table 29: PUBLISH Parameters

   Response: Publication receipt with content identifier and channel
   confirmation.  Idempotent: No.  Error codes: 400, 403, 409.

6.  INTEGRATE Category Methods

   INTEGRATE methods connect, synchronize, or unify data and services
   across system boundaries.  Agents use INTEGRATE methods to eliminate
   fragmentation across silos, align state across environments, and
   establish relationships between entities.  The INTEGRATE category is
   distinct from TRANSACT (no external commitment or irreversible state
   change) and from COMPUTE (no transformation of content into a new
   analytical form).  INTEGRATE methods concern structural alignment and
   relational connectivity.

6.1.  MERGE

   Purpose: Combine two or more datasets, documents, or resources into a
   unified result, resolving conflicts according to a declared policy.

   Use case: An agent merges duplicate customer profiles detected across
   two acquired subsidiary databases into a single canonical record,
   applying a "most recently updated" conflict resolution strategy.










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     +=====================+==========+==============================+
     | Parameter           | Required | Description                  |
     +=====================+==========+==============================+
     | sources             | *MUST*   | List of resources or inline  |
     |                     |          | data to merge                |
     +---------------------+----------+------------------------------+
     | strategy            | *SHOULD* | Merge strategy: union,       |
     |                     |          | intersection, latest, manual |
     +---------------------+----------+------------------------------+
     | conflict_resolution | *MAY*    | Policy for conflicting       |
     |                     |          | fields                       |
     +---------------------+----------+------------------------------+

                         Table 30: MERGE Parameters

   Response: Merged result with conflict report if applicable.
   Idempotent: No.  Error codes: 400, 409, 422.

6.2.  LINK

   Purpose: Create a persistent association or relationship between two
   entities in a system of record.  Distinguished from MAP (which
   defines structural schema correspondence) by creating a relationship
   record between specific instances.

   Use case: An agent links a user's enterprise SSO identity to their
   account in a third-party analytics platform, establishing a
   persistent cross-system identity association.

     +==============+==========+====================================+
     | Parameter    | Required | Description                        |
     +==============+==========+====================================+
     | source       | *MUST*   | Source entity identifier           |
     +--------------+----------+------------------------------------+
     | target       | *MUST*   | Target entity identifier           |
     +--------------+----------+------------------------------------+
     | relationship | *MUST*   | Type of relationship               |
     +--------------+----------+------------------------------------+
     | metadata     | *MAY*    | Additional relationship attributes |
     +--------------+----------+------------------------------------+

                        Table 31: LINK Parameters

   Response: Link record with relationship identifier.  Idempotent: No.
   Error codes: 404, 409.






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6.3.  SYNC

   Purpose: Reconcile the state of a local resource with a remote
   authoritative source, aligning records bidirectionally or
   unidirectionally.

   Use case: An agent synchronizes the local product inventory cache
   with the warehouse management system, pulling delta changes since the
   last sync timestamp and pushing any local updates that occurred
   offline.

    +=================+==========+====================================+
    | Parameter       | Required | Description                        |
    +=================+==========+====================================+
    | resource        | *MUST*   | Resource to synchronize            |
    +-----------------+----------+------------------------------------+
    | remote          | *MUST*   | Authoritative source URI           |
    +-----------------+----------+------------------------------------+
    | direction       | *SHOULD* | pull, push, or bidirectional       |
    +-----------------+----------+------------------------------------+
    | conflict_policy | *MAY*    | remote_wins, local_wins, or manual |
    +-----------------+----------+------------------------------------+

                         Table 32: SYNC Parameters

   Response: Sync receipt with change summary.  Idempotent: No.  Error
   codes: 404, 409, 503.

6.4.  IMPORT

   Purpose: Bring external data into the agent's operational context or
   a designated storage target from a non-AGTP-native source.
   Distinguished from FETCH (which retrieves a known resource by ID from
   an AGTP-native address) by ingesting from external systems.

   Use case: An agent imports a CSV export of contact records from a
   legacy CRM into the new system, resolving format differences and
   logging import statistics.













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       +=================+==========+==============================+
       | Parameter       | Required | Description                  |
       +=================+==========+==============================+
       | source          | *MUST*   | URI or inline data to import |
       +-----------------+----------+------------------------------+
       | target          | *MUST*   | Destination identifier       |
       |                 |          | within the agent's context   |
       +-----------------+----------+------------------------------+
       | format          | *SHOULD* | Format of the source data    |
       +-----------------+----------+------------------------------+
       | conflict_policy | *MAY*    | Behavior on conflict:        |
       |                 |          | overwrite, skip, merge       |
       +-----------------+----------+------------------------------+

                        Table 33: IMPORT Parameters

   Response: Import receipt with record count and any conflict
   resolutions.  Idempotent: No.  Error codes: 400, 409, 422.

6.5.  MAP

   Purpose: Define a structural correspondence between two schemas, data
   models, or field sets.  Distinguished from TRANSFORM (which applies a
   mapping to convert a specific payload) by producing a reusable
   mapping definition rather than executing a one-time conversion.

   Use case: An agent generates a field-level mapping between an
   external vendor's order schema and the internal canonical order
   schema, producing a reusable mapping document that subsequent
   TRANSFORM calls can reference.

     +=================+==========+==================================+
     | Parameter       | Required | Description                      |
     +=================+==========+==================================+
     | source_schema   | *MUST*   | Schema or data model to map from |
     +-----------------+----------+----------------------------------+
     | target_schema   | *MUST*   | Schema or data model to map to   |
     +-----------------+----------+----------------------------------+
     | strategy        | *SHOULD* | Mapping strategy: exact,         |
     |                 |          | semantic, custom                 |
     +-----------------+----------+----------------------------------+
     | unmapped_policy | *MAY*    | Behavior for fields with no      |
     |                 |          | target: ignore, flag, preserve   |
     +-----------------+----------+----------------------------------+

                          Table 34: MAP Parameters





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   Response: Mapping document with per-field correspondence and
   confidence scores.  Idempotent: Yes. Error codes: 400, 422.

6.6.  CONNECT

   Purpose: Establish a conduit, session, or integration channel between
   two systems, services, or agents.  Distinguished from LINK (which
   creates a record-level association) by establishing an active
   communication or data pathway.

   Use case: An agent establishes a streaming data connection between a
   sensor telemetry feed and the observability platform, configuring the
   channel parameters and returning a handle for subsequent operations.

   +==============+==========+========================================+
   | Parameter    | Required | Description                            |
   +==============+==========+========================================+
   | source       | *MUST*   | Source system or agent identifier      |
   +--------------+----------+----------------------------------------+
   | destination  | *MUST*   | Destination system or agent identifier |
   +--------------+----------+----------------------------------------+
   | channel_type | *SHOULD* | Type of connection: stream, webhook,   |
   |              |          | polling, event-bus                     |
   +--------------+----------+----------------------------------------+
   | config       | *MAY*    | Channel-specific configuration         |
   |              |          | parameters                             |
   +--------------+----------+----------------------------------------+
   | ttl          | *MAY*    | Connection lifetime in seconds;        |
   |              |          | persists until CANCEL if absent        |
   +--------------+----------+----------------------------------------+

                       Table 35: CONNECT Parameters

   Response: Connection handle with connection ID and channel metadata.
   Idempotent: No.  Error codes: 404, 409, 503.

6.7.  EMBED

   Purpose: Insert one component, dataset, or agent capability into
   another as a nested or composed element.  Used when an integration
   requires one system to host or expose the functionality of another
   within its own operational context.

   Use case: An agent embeds a third-party risk-scoring model's output
   into the organization's credit decisioning workflow as a named sub-
   component, making its scores available inline within decisioning
   records.




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   +===========+==========+============================================+
   | Parameter | Required | Description                                |
   +===========+==========+============================================+
   | source    | *MUST*   | Component, dataset, or                     |
   |           |          | capability to embed                        |
   +-----------+----------+--------------------------------------------+
   | target    | *MUST*   | Container or context to                    |
   |           |          | embed into                                 |
   +-----------+----------+--------------------------------------------+
   | binding   | *SHOULD* | Named reference or mount                   |
   |           |          | point within the target                    |
   +-----------+----------+--------------------------------------------+
   | version   | *MAY*    | Specific version of the                    |
   |           |          | source to embed                            |
   +-----------+----------+--------------------------------------------+

                         Table 36: EMBED Parameters

   Response: Embedding receipt with binding reference and version.
   Idempotent: No.  Error codes: 400, 404, 409.

7.  COMMUNICATE Category Methods

   COMMUNICATE methods deliver signals, messages, or structured outputs
   to recipients.  Agents use COMMUNICATE methods to push information,
   respond to incoming requests, and surface results to humans and
   systems.

7.1.  ALERT

   Purpose: Send a high-priority, time-sensitive message to a recipient
   or group.  Distinguished from NOTIFY (Tier 1, general-purpose async
   push) by signaling urgency and requiring acknowledgment handling if
   not acknowledged within a declared timeout.

   Use case: An infrastructure monitoring agent sends a critical alert
   to the on-call team when database latency exceeds the SLA threshold,
   carrying metric value, threshold, and recommended escalation path.













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        +=================+==========+===========================+
        | Parameter       | Required | Description               |
        +=================+==========+===========================+
        | recipient       | *MUST*   | Target Agent-ID, human    |
        |                 |          | endpoint, or group        |
        +-----------------+----------+---------------------------+
        | message         | *MUST*   | Alert content with        |
        |                 |          | severity and context      |
        +-----------------+----------+---------------------------+
        | severity        | *MUST*   | critical, high, or        |
        |                 |          | warning                   |
        +-----------------+----------+---------------------------+
        | acknowledge_by  | *SHOULD* | ISO 8601 deadline for     |
        |                 |          | acknowledgment            |
        +-----------------+----------+---------------------------+
        | escalation_path | *MAY*    | Fallback recipient if not |
        |                 |          | acknowledged by deadline  |
        +-----------------+----------+---------------------------+

                        Table 37: ALERT Parameters

   Response: Alert delivery receipt with alert ID.  Implementations
   *SHOULD* track acknowledgment state and trigger escalation on
   timeout.  Idempotent: No.  Error codes: 400, 404, 503.

7.2.  BROADCAST

   Purpose: Disseminate information simultaneously to multiple
   recipients or a defined group.  Distinguished from NOTIFY (targeted
   at a specific recipient) by addressing an audience rather than an
   individual and not expecting individual responses.

   Use case: An agent broadcasts a scheduled maintenance window
   notification to all registered subscriber endpoints across three
   governance zones.
















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       +===========+==========+===================================+
       | Parameter | Required | Description                       |
       +===========+==========+===================================+
       | audience  | *MUST*   | Group identifier, zone, or list   |
       |           |          | of recipient identifiers          |
       +-----------+----------+-----------------------------------+
       | content   | *MUST*   | Broadcast payload                 |
       +-----------+----------+-----------------------------------+
       | channel   | *SHOULD* | Delivery channel: agtp, email,    |
       |           |          | webhook, sms                      |
       +-----------+----------+-----------------------------------+
       | expiry    | *MAY*    | Timestamp after which the         |
       |           |          | broadcast should not be delivered |
       +-----------+----------+-----------------------------------+

                      Table 38: BROADCAST Parameters

   Response: Broadcast receipt with message ID and delivery count.
   Idempotent: No.  Error codes: 400, 403, 503.

7.3.  REPLY

   Purpose: Provide a direct, traceable response to an incoming NOTIFY,
   ESCALATE, or QUERY that explicitly requested a reply.  Creates a
   response thread linked to the originating task.

   Use case: A human-in-the-loop handler sends a REPLY to a pending
   ESCALATE, providing a decision and carrying the original escalation
   ID for thread continuity.

   +=============+==========+=========================================+
   | Parameter   | Required | Description                             |
   +=============+==========+=========================================+
   | in_reply_to | *MUST*   | Task-ID of the message being replied to |
   +-------------+----------+-----------------------------------------+
   | content     | *MUST*   | Reply content                           |
   +-------------+----------+-----------------------------------------+
   | urgency     | *SHOULD* | critical, informational, or background  |
   +-------------+----------+-----------------------------------------+

                        Table 39: REPLY Parameters

   Response: Reply receipt.  Idempotent: No.  Error codes: 404, 400.








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7.4.  SEND

   Purpose: Deliver a message or payload to a recipient through a
   declared external channel.  Distinguished from NOTIFY (AGTP-native
   async push) by targeting non-AGTP delivery channels.

   Use case: An agent sends an email confirmation to a customer's
   registered email address after completing a booking, using a declared
   template identifier.

           +=============+==========+==========================+
           | Parameter   | Required | Description              |
           +=============+==========+==========================+
           | recipient   | *MUST*   | Channel-specific address |
           +-------------+----------+--------------------------+
           | channel     | *MUST*   | Delivery channel: email, |
           |             |          | webhook, sms, push       |
           +-------------+----------+--------------------------+
           | content     | *MUST*   | Message content          |
           +-------------+----------+--------------------------+
           | template_id | *MAY*    | Template identifier for  |
           |             |          | formatted delivery       |
           +-------------+----------+--------------------------+

                         Table 40: SEND Parameters

   Response: Delivery receipt with channel-specific confirmation.
   Idempotent: No.  Error codes: 400, 404, 503.

7.5.  REPORT

   Purpose: Generate and deliver a structured summary or analysis
   document to a principal or system.  Distinguished from NOTIFY (raw
   payload push) by producing a formatted output artifact with declared
   structure.

   Use case: An agent generates and delivers a weekly sales performance
   summary to the sales leadership distribution list in PDF format.













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   +=============+==========+==========================================+
   | Parameter   | Required | Description                              |
   +=============+==========+==========================================+
   | report_type | *MUST*   | Report category                          |
   +-------------+----------+------------------------------------------+
   | scope       | *MUST*   | Data scope or time range for the report  |
   +-------------+----------+------------------------------------------+
   | recipient   | *MUST*   | Target principal or endpoint             |
   +-------------+----------+------------------------------------------+
   | format      | *SHOULD* | Output format: pdf, json, html,          |
   |             |          | markdown                                 |
   +-------------+----------+------------------------------------------+

                        Table 41: REPORT Parameters

   Response: Report delivery receipt with document identifier.
   Idempotent: No.  Error codes: 400, 422, 503.

8.  ORCHESTRATE Category Methods

   ORCHESTRATE methods coordinate, sequence, and manage workflows,
   tasks, and agents across time and system boundaries.  Agents use
   ORCHESTRATE methods to build composite execution flows, manage
   failure recovery, and direct work to appropriate handlers.

8.1.  CHAIN

   Purpose: Link a defined sequence of AGTP method invocations into a
   composite workflow where each step's output may be used as input for
   subsequent steps.  Distinguished from BATCH (which executes unrelated
   tasks in parallel) by enforcing sequential dependency between steps.

   Use case: An agent chains SEARCH, followed by ANALYZE, followed by
   REPORT into a single declared workflow for weekly competitor
   intelligence, where each step uses the prior step's output.
















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    +=====================+==========+================================+
    | Parameter           | Required | Description                    |
    +=====================+==========+================================+
    | steps               | *MUST*   | Ordered list of AGTP method    |
    |                     |          | calls with parameters          |
    +---------------------+----------+--------------------------------+
    | on_failure          | *SHOULD* | Behavior if a step fails:      |
    |                     |          | abort, skip, retry, escalate   |
    +---------------------+----------+--------------------------------+
    | context_propagation | *MAY*    | If true, each step's output is |
    |                     |          | available to subsequent steps  |
    +---------------------+----------+--------------------------------+
    | timeout             | *MAY*    | Maximum total execution time   |
    |                     |          | across all steps in seconds    |
    +---------------------+----------+--------------------------------+

                         Table 42: CHAIN Parameters

   Response: Execution receipt with chain ID and per-step status.
   Idempotent: No.  Error codes: 400, 408, 422.

8.2.  BATCH

   Purpose: Group multiple independent AGTP method calls for concurrent
   or bulk execution, reducing round-trip overhead.  Distinguished from
   CHAIN (sequentially dependent) by executing steps independently
   without output dependency.

   Use case: An agent batches twenty TRANSLATE calls for product
   descriptions into a single BATCH invocation, reducing latency from
   twenty serial round-trips to a single parallel execution.

   +=================+==========+======================================+
   | Parameter       | Required | Description                          |
   +=================+==========+======================================+
   | calls           | *MUST*   | List of independent AGTP             |
   |                 |          | method calls to execute              |
   +-----------------+----------+--------------------------------------+
   | execution_mode  | *SHOULD* | parallel or sequential;              |
   |                 |          | default parallel                     |
   +-----------------+----------+--------------------------------------+
   | partial_success | *MAY*    | If true, return results              |
   |                 |          | for successful calls                 |
   |                 |          | even if others fail                  |
   +-----------------+----------+--------------------------------------+

                         Table 43: BATCH Parameters




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   Response: Batch result containing individual outcome per call.
   Idempotent: Conditional (depends on idempotency of component calls).
   Error codes: 400, 408, 422.

8.3.  MONITOR

   Purpose: Establish ongoing observation of an agent, resource, or
   condition.  Returns a subscription handle; the AGTP server delivers
   updates via NOTIFY when observed conditions change.

   Use case: An agent establishes a monitor on the behavioral trust
   score of a set of sub-agents, receiving NOTIFY updates when any
   agent's score drops below the declared threshold.

      +===========+==========+=====================================+
      | Parameter | Required | Description                         |
      +===========+==========+=====================================+
      | target    | *MUST*   | Agent-ID, resource URI, or          |
      |           |          | condition expression                |
      +-----------+----------+-------------------------------------+
      | events    | *MUST*   | Event types to observe              |
      +-----------+----------+-------------------------------------+
      | callback  | *MUST*   | AGTP endpoint for NOTIFY delivery   |
      +-----------+----------+-------------------------------------+
      | threshold | *MAY*    | Condition value that triggers       |
      |           |          | notification                        |
      +-----------+----------+-------------------------------------+
      | interval  | *MAY*    | Polling interval in seconds if      |
      |           |          | event-based delivery is unavailable |
      +-----------+----------+-------------------------------------+

                       Table 44: MONITOR Parameters

   Response: Monitor subscription receipt with subscription identifier.
   To cancel monitoring, send NOTIFY with event type monitor_cancel and
   the subscription identifier.  Idempotent: No.  Error codes: 404, 400.

8.4.  ROUTE

   Purpose: Direct a task, message, or work item to the appropriate
   handler or agent based on declared routing criteria.

   Use case: An agent routes an incoming customer inquiry to the
   appropriate specialized handling agent based on topic classification,
   account tier, and declared availability of candidate handlers.






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   +============+==========+==========================================+
   | Parameter  | Required | Description                              |
   +============+==========+==========================================+
   | payload    | *MUST*   | Item to route                            |
   +------------+----------+------------------------------------------+
   | criteria   | *MUST*   | Routing criteria or rules                |
   +------------+----------+------------------------------------------+
   | candidates | *SHOULD* | List of candidate Agent-IDs or endpoints |
   +------------+----------+------------------------------------------+
   | fallback   | *MAY*    | Default handler if no candidate matches  |
   +------------+----------+------------------------------------------+

                        Table 45: ROUTE Parameters

   Response: Routing decision with selected handler identifier.
   Idempotent: No.  Error codes: 404, 422, 503.

8.5.  RETRY

   Purpose: Re-attempt a previously failed AGTP method invocation using
   a prior Task-ID.  Distinguished from a new invocation by carrying the
   original Task-ID for idempotency checking at the server.

   Use case: An agent retries a failed BOOK call after a 503
   Unavailable, carrying the original Task-ID so the booking system can
   detect and suppress any duplicate if the original call was partially
   processed.

    +==================+==========+==================================+
    | Parameter        | Required | Description                      |
    +==================+==========+==================================+
    | original_task_id | *MUST*   | Task-ID of the failed invocation |
    +------------------+----------+----------------------------------+
    | delay            | *MAY*    | Seconds to wait before retrying  |
    +------------------+----------+----------------------------------+
    | max_attempts     | *MAY*    | Maximum total attempts including |
    |                  |          | this one                         |
    +------------------+----------+----------------------------------+

                        Table 46: RETRY Parameters

   Response: New task receipt linked to the original task.  Idempotent:
   Yes (for idempotent original methods); No for non-idempotent
   originals.  Error codes: 404, 409.







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8.6.  PAUSE

   Purpose: Temporarily halt a scheduled or repeating workflow without
   terminating it.  Distinguished from SUSPEND (Tier 1, which targets a
   session) by targeting a workflow or schedule record.

   Use case: An agent pauses a recurring data pipeline workflow during a
   maintenance window, setting a resume timestamp at the scheduled end
   of the window.

          +=============+==========+============================+
          | Parameter   | Required | Description                |
          +=============+==========+============================+
          | workflow_id | *MUST*   | Identifier of the workflow |
          |             |          | or schedule to pause       |
          +-------------+----------+----------------------------+
          | reason      | *SHOULD* | Reason for pause           |
          +-------------+----------+----------------------------+
          | resume_at   | *MAY*    | ISO 8601 timestamp for     |
          |             |          | automatic resumption       |
          +-------------+----------+----------------------------+

                         Table 47: PAUSE Parameters

   Response: Pause receipt with workflow status.  Idempotent: No.  Error
   codes: 404, 409.

8.7.  RESUME

   Purpose: Restart a paused workflow or a suspended session.

   Use case: An agent resumes a paused procurement workflow after the
   required human approval has been received, using the resumption nonce
   issued at PAUSE time.

    +==================+=============+================================+
    | Parameter        | Required    | Description                    |
    +==================+=============+================================+
    | workflow_id      | *MUST*      | Workflow or session identifier |
    +------------------+-------------+--------------------------------+
    | resumption_nonce | *MUST* (for | Nonce issued at SUSPEND or     |
    |                  | sessions)   | PAUSE                          |
    +------------------+-------------+--------------------------------+
    | checkpoint       | *MAY*       | State override for resumption  |
    |                  |             | context                        |
    +------------------+-------------+--------------------------------+

                        Table 48: RESUME Parameters



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   Response: Resumption receipt with current workflow status.
   Idempotent: No.  Error codes: 404, 408, 409.

8.8.  RUN

   Purpose: Execute a named, registered procedure or automation script.
   Implementations *MUST NOT* accept free-form execution strings; the
   procedure *MUST* be identified by a registered procedure_id.

   Use case: An agent runs a registered data quality validation
   procedure against a freshly imported dataset, passing the dataset ID
   as input and receiving a structured pass/fail report.

           +==============+==========+=========================+
           | Parameter    | Required | Description             |
           +==============+==========+=========================+
           | procedure_id | *MUST*   | Registered identifier   |
           |              |          | of the procedure to run |
           +--------------+----------+-------------------------+
           | input        | *MAY*    | Input parameters for    |
           |              |          | the procedure           |
           +--------------+----------+-------------------------+
           | timeout      | *MAY*    | Maximum execution time  |
           |              |          | in seconds              |
           +--------------+----------+-------------------------+

                          Table 49: RUN Parameters

   Security note: RUN *MUST* require activation:run in the agent's
   Authority-Scope.  Free-form execution strings *MUST NOT* be accepted
   under any circumstances.  Idempotent: No.  Error codes: 403, 404,
   408, 422, 451.

8.9.  CHECK

   Purpose: Query the status or health of an agent, resource, workflow,
   or external dependency.  Returns a structured status response.

   Use case: An agent checks the availability of all three downstream
   payment processors before initiating a purchase, using depth: shallow
   to minimize latency.










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         +===========+==========+================================+
         | Parameter | Required | Description                    |
         +===========+==========+================================+
         | target    | *MUST*   | Agent-ID, resource URI, or     |
         |           |          | system identifier              |
         +-----------+----------+--------------------------------+
         | depth     | *MAY*    | shallow (reachability only) or |
         |           |          | deep (full dependency check)   |
         +-----------+----------+--------------------------------+

                         Table 50: CHECK Parameters

   Response: Status document with health indicators per component.
   Idempotent: Yes. Error codes: 404, 408.

9.  Method Summary

   +=========+===========+=========+===========+======================+
   |Method   |Category   |State-   |Idempotent | Key Constraints      |
   |         |           |Modifying|           |                      |
   +=========+===========+=========+===========+======================+
   |FETCH    |Acquire    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |SEARCH   |Acquire    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |SCAN     |Acquire    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |PULL     |Acquire    |Yes      |No         | Consumes items       |
   +---------+-----------+---------+-----------+----------------------+
   |FIND     |Acquire    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |ANALYZE  |Acquire    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |EXTRACT  |Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |FILTER   |Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |VALIDATE |Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |TRANSFORM|Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |TRANSLATE|Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |NORMALIZE|Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |PREDICT  |Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |RANK     |Compute    |No       |Yes        |                      |



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   +---------+-----------+---------+-----------+----------------------+
   |CLASSIFY |Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |CALCULATE|Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |EVALUATE |Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |GENERATE |Compute    |No       |Yes        | code output requires |
   |         |           |         |           | review before RUN    |
   +---------+-----------+---------+-----------+----------------------+
   |RECOMMEND|Compute    |No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+
   |QUOTE    |Transact   |No       |Yes        | No execution         |
   +---------+-----------+---------+-----------+----------------------+
   |REGISTER |Transact   |Yes      |No         | Use idempotency_key  |
   +---------+-----------+---------+-----------+----------------------+
   |SUBMIT   |Transact   |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |AUTHORIZE|Transact   |Yes      |No         | Requires             |
   |         |           |         |           | authorization:grant; |
   |         |           |         |           | scope subset only    |
   +---------+-----------+---------+-----------+----------------------+
   |CANCEL   |Transact   |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |TRANSFER |Transact   |Yes      |No         | Requires scope       |
   +---------+-----------+---------+-----------+----------------------+
   |PURCHASE |Transact   |Yes      |No         | Requires             |
   |         |           |         |           | payments:purchase    |
   +---------+-----------+---------+-----------+----------------------+
   |SIGN     |Transact   |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |LOG      |Transact   |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |PUBLISH  |Transact   |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |MERGE    |Integrate  |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |LINK     |Integrate  |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |SYNC     |Integrate  |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |IMPORT   |Integrate  |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |MAP      |Integrate  |No       |Yes        | Produces mapping     |
   |         |           |         |           | definition; does not |
   |         |           |         |           | convert data         |
   +---------+-----------+---------+-----------+----------------------+
   |CONNECT  |Integrate  |Yes      |No         |                      |



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   +---------+-----------+---------+-----------+----------------------+
   |EMBED    |Integrate  |Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |ALERT    |Communicate|No       |No         | Acknowledgment       |
   |         |           |         |           | tracking required    |
   +---------+-----------+---------+-----------+----------------------+
   |BROADCAST|Communicate|No       |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |REPLY    |Communicate|No       |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |SEND     |Communicate|No       |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |REPORT   |Communicate|Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |CHAIN    |Orchestrate|Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |BATCH    |Orchestrate|Yes      |Conditional|                      |
   +---------+-----------+---------+-----------+----------------------+
   |MONITOR  |Orchestrate|Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |ROUTE    |Orchestrate|Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |RETRY    |Orchestrate|Yes      |Conditional|                      |
   +---------+-----------+---------+-----------+----------------------+
   |PAUSE    |Orchestrate|Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |RESUME   |Orchestrate|Yes      |No         |                      |
   +---------+-----------+---------+-----------+----------------------+
   |RUN      |Orchestrate|Yes      |No         | No free-form strings |
   +---------+-----------+---------+-----------+----------------------+
   |CHECK    |Orchestrate|No       |Yes        |                      |
   +---------+-----------+---------+-----------+----------------------+

                     Table 51: Tier 2 Method Summary

10.  Security Considerations

10.1.  PURCHASE Authorization

   The PURCHASE method carries financial consequences and *MUST* be
   subject to strict scope enforcement.  Implementations *MUST* reject
   PURCHASE requests that do not carry payments:purchase in the
   Authority-Scope header with 451 Scope Violation.  Budget-Limit
   validation *MUST* occur before execution; 452 Budget Exceeded *MUST*
   be returned if the purchase amount would exceed the declared budget.






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10.2.  AUTHORIZE Scope Constraint

   The AUTHORIZE method grants permissions to other entities and is
   subject to the same anti-laundering constraint that applies to
   DELEGATE in the Tier 1 core: the scope granted by an AUTHORIZE call
   *MUST NOT* exceed the authorizing agent's own Authority-Scope.  Any
   implementation receiving an AUTHORIZE request where the grant scope
   exceeds the authorizing agent's declared scope *MUST* return 451
   Scope Violation and *MUST* log the event.

10.3.  RUN Method Safety

   The RUN method is the highest-risk Tier 2 method.  Implementations
   *MUST* maintain a registry of permitted procedure_id values and *MUST
   NOT* execute procedures not in that registry.  Free-form execution
   strings *MUST* be rejected.  Each RUN invocation *MUST* be logged
   with the full procedure_id, input parameters, and executing Agent-ID.

10.4.  GENERATE Code Output Safety

   When GENERATE is invoked with output_type: code, the resulting code
   *MUST NOT* be passed directly to RUN without human or governance
   review.  Implementations providing a pipeline from GENERATE to RUN
   *MUST* insert an explicit VALIDATE or approval step between them.

10.5.  MONITOR Callback Verification

   The callback parameter in MONITOR specifies an AGTP endpoint to
   receive updates.  Implementations *MUST* verify that the callback
   endpoint is reachable and that the requesting agent has authority to
   receive notifications at that endpoint before establishing a
   monitoring subscription.  Unverified callbacks are a potential
   exfiltration vector.

10.6.  TRANSFER and Ownership Chain Integrity

   TRANSFER operations modify resource ownership and create audit
   obligations.  Implementations *MUST* record the complete ownership
   chain for each transferred resource in the governance audit trail.
   The Attribution-Record for TRANSFER *MUST* include both
   from_principal and to_principal.

11.  IANA Considerations

   This document requests registration of the following methods in the
   IANA AGTP Method Registry established by [AGTP] Section 9.2:





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    +===========+=============+===========+===========================+
    | Method    | Category    | Status    | Description               |
    +===========+=============+===========+===========================+
    | FETCH     | Acquire     | Permanent | Retrieve a known resource |
    |           |             |           | by identifier from an     |
    |           |             |           | AGTP-native address       |
    +-----------+-------------+-----------+---------------------------+
    | SEARCH    | Acquire     | Permanent | Execute a structured      |
    |           |             |           | query against a data      |
    |           |             |           | source using field        |
    |           |             |           | filters and sort criteria |
    +-----------+-------------+-----------+---------------------------+
    | SCAN      | Acquire     | Permanent | Iterate over a collection |
    |           |             |           | for completeness;         |
    |           |             |           | prioritizes coverage over |
    |           |             |           | relevance                 |
    +-----------+-------------+-----------+---------------------------+
    | PULL      | Acquire     | Permanent | Consume pending items     |
    |           |             |           | from a queue or stream;   |
    |           |             |           | agent takes ownership of  |
    |           |             |           | pulled items              |
    +-----------+-------------+-----------+---------------------------+
    | FIND      | Acquire     | Permanent | Locate agents or entities |
    |           |             |           | matching criteria in a    |
    |           |             |           | registry or namespace     |
    +-----------+-------------+-----------+---------------------------+
    | ANALYZE   | Acquire     | Permanent | Detect patterns,          |
    |           |             |           | anomalies, or trends in a |
    |           |             |           | dataset without modifying |
    |           |             |           | it                        |
    +-----------+-------------+-----------+---------------------------+
    | EXTRACT   | Compute     | Permanent | Pull structured fields    |
    |           |             |           | from unstructured or      |
    |           |             |           | semi-structured source    |
    |           |             |           | content                   |
    +-----------+-------------+-----------+---------------------------+
    | FILTER    | Compute     | Permanent | Return only records from  |
    |           |             |           | a dataset that satisfy    |
    |           |             |           | declared criteria         |
    +-----------+-------------+-----------+---------------------------+
    | VALIDATE  | Compute     | Permanent | Check data or a proposed  |
    |           |             |           | action against a schema   |
    |           |             |           | or rule set; returns      |
    |           |             |           | pass/fail                 |
    +-----------+-------------+-----------+---------------------------+
    | TRANSFORM | Compute     | Permanent | Convert a specific        |
    |           |             |           | payload from one format   |
    |           |             |           | or schema to another      |



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    +-----------+-------------+-----------+---------------------------+
    | TRANSLATE | Compute     | Permanent | Convert content between   |
    |           |             |           | human languages           |
    +-----------+-------------+-----------+---------------------------+
    | NORMALIZE | Compute     | Permanent | Standardize data values   |
    |           |             |           | to canonical form: dates, |
    |           |             |           | phones, addresses,        |
    |           |             |           | currency                  |
    +-----------+-------------+-----------+---------------------------+
    | PREDICT   | Compute     | Permanent | Apply a model to input    |
    |           |             |           | data and return a         |
    |           |             |           | probability estimate or   |
    |           |             |           | forecast                  |
    +-----------+-------------+-----------+---------------------------+
    | RANK      | Compute     | Permanent | Score and order a         |
    |           |             |           | provided list of items by |
    |           |             |           | a declared criterion      |
    +-----------+-------------+-----------+---------------------------+
    | CLASSIFY  | Compute     | Permanent | Assign categorical labels |
    |           |             |           | to items from a known     |
    |           |             |           | classification scheme     |
    +-----------+-------------+-----------+---------------------------+
    | CALCULATE | Compute     | Permanent | Perform deterministic     |
    |           |             |           | numeric, logical, or      |
    |           |             |           | financial computation on  |
    |           |             |           | structured inputs         |
    +-----------+-------------+-----------+---------------------------+
    | EVALUATE  | Compute     | Permanent | Score a target against a  |
    |           |             |           | weighted rubric; returns  |
    |           |             |           | graded assessment with    |
    |           |             |           | rationale                 |
    +-----------+-------------+-----------+---------------------------+
    | GENERATE  | Compute     | Permanent | Produce new text,         |
    |           |             |           | structured data, or code  |
    |           |             |           | from a source             |
    |           |             |           | specification or prompt   |
    +-----------+-------------+-----------+---------------------------+
    | RECOMMEND | Compute     | Permanent | Generate a ranked         |
    |           |             |           | candidate set tailored to |
    |           |             |           | a declared context and    |
    |           |             |           | goal                      |
    +-----------+-------------+-----------+---------------------------+
    | QUOTE     | Transact    | Permanent | Return a cost estimate    |
    |           |             |           | for a proposed method     |
    |           |             |           | call without executing it |
    +-----------+-------------+-----------+---------------------------+
    | REGISTER  | Transact    | Permanent | Create a new record,      |
    |           |             |           | entity, or subscription   |



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    |           |             |           | in a target system        |
    +-----------+-------------+-----------+---------------------------+
    | SUBMIT    | Transact    | Permanent | Deliver a document or     |
    |           |             |           | work item to a processing |
    |           |             |           | system or queue           |
    +-----------+-------------+-----------+---------------------------+
    | AUTHORIZE | Transact    | Permanent | Issue an active           |
    |           |             |           | permission grant; scope   |
    |           |             |           | granted must not exceed   |
    |           |             |           | authorizing agent's scope |
    +-----------+-------------+-----------+---------------------------+
    | CANCEL    | Transact    | Permanent | Revoke or reverse a       |
    |           |             |           | specific prior            |
    |           |             |           | transaction, booking, or  |
    |           |             |           | reservation               |
    +-----------+-------------+-----------+---------------------------+
    | TRANSFER  | Transact    | Permanent | Move ownership or custody |
    |           |             |           | of a resource between     |
    |           |             |           | principals                |
    +-----------+-------------+-----------+---------------------------+
    | PURCHASE  | Transact    | Permanent | Execute a financial       |
    |           |             |           | transaction; requires     |
    |           |             |           | payments:purchase in      |
    |           |             |           | Authority-Scope           |
    +-----------+-------------+-----------+---------------------------+
    | SIGN      | Transact    | Permanent | Apply a cryptographic     |
    |           |             |           | signature to a document   |
    |           |             |           | or artifact               |
    +-----------+-------------+-----------+---------------------------+
    | LOG       | Transact    | Permanent | Write a structured record |
    |           |             |           | to an audit trail for     |
    |           |             |           | governance or compliance  |
    |           |             |           | purposes                  |
    +-----------+-------------+-----------+---------------------------+
    | PUBLISH   | Transact    | Permanent | Make content available to |
    |           |             |           | a defined audience or     |
    |           |             |           | channel                   |
    +-----------+-------------+-----------+---------------------------+
    | MERGE     | Integrate   | Permanent | Combine two or more       |
    |           |             |           | datasets into a unified   |
    |           |             |           | result with declared      |
    |           |             |           | conflict resolution       |
    +-----------+-------------+-----------+---------------------------+
    | LINK      | Integrate   | Permanent | Create a persistent       |
    |           |             |           | association between two   |
    |           |             |           | specific entity instances |
    +-----------+-------------+-----------+---------------------------+
    | SYNC      | Integrate   | Permanent | Reconcile local and       |



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    |           |             |           | remote resource state     |
    |           |             |           | bidirectionally or        |
    |           |             |           | unidirectionally          |
    +-----------+-------------+-----------+---------------------------+
    | IMPORT    | Integrate   | Permanent | Ingest data from a non-   |
    |           |             |           | AGTP-native external      |
    |           |             |           | source into the agent's   |
    |           |             |           | context                   |
    +-----------+-------------+-----------+---------------------------+
    | MAP       | Integrate   | Permanent | Define a reusable         |
    |           |             |           | structural correspondence |
    |           |             |           | between two schemas or    |
    |           |             |           | data models               |
    +-----------+-------------+-----------+---------------------------+
    | CONNECT   | Integrate   | Permanent | Establish an active       |
    |           |             |           | communication channel or  |
    |           |             |           | data pathway between two  |
    |           |             |           | systems                   |
    +-----------+-------------+-----------+---------------------------+
    | EMBED     | Integrate   | Permanent | Insert a component or     |
    |           |             |           | capability into another   |
    |           |             |           | system as a named sub-    |
    |           |             |           | component                 |
    +-----------+-------------+-----------+---------------------------+
    | ALERT     | Communicate | Permanent | Send a high-priority,     |
    |           |             |           | time-sensitive message    |
    |           |             |           | requiring acknowledgment  |
    +-----------+-------------+-----------+---------------------------+
    | BROADCAST | Communicate | Permanent | Disseminate a message     |
    |           |             |           | simultaneously to a group |
    |           |             |           | or zone without expecting |
    |           |             |           | replies                   |
    +-----------+-------------+-----------+---------------------------+
    | REPLY     | Communicate | Permanent | Provide a traceable       |
    |           |             |           | response to a prior       |
    |           |             |           | NOTIFY, ESCALATE, or      |
    |           |             |           | QUERY                     |
    +-----------+-------------+-----------+---------------------------+
    | SEND      | Communicate | Permanent | Deliver a message through |
    |           |             |           | an external channel:      |
    |           |             |           | email, webhook, SMS, or   |
    |           |             |           | push                      |
    +-----------+-------------+-----------+---------------------------+
    | REPORT    | Communicate | Permanent | Generate and deliver a    |
    |           |             |           | structured summary        |
    |           |             |           | document to a principal   |
    |           |             |           | or system                 |
    +-----------+-------------+-----------+---------------------------+



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    | CHAIN     | Orchestrate | Permanent | Execute a sequence of     |
    |           |             |           | method calls with output- |
    |           |             |           | to-input dependency       |
    |           |             |           | between steps             |
    +-----------+-------------+-----------+---------------------------+
    | BATCH     | Orchestrate | Permanent | Execute multiple          |
    |           |             |           | independent method calls  |
    |           |             |           | concurrently to reduce    |
    |           |             |           | round-trip overhead       |
    +-----------+-------------+-----------+---------------------------+
    | MONITOR   | Orchestrate | Permanent | Establish ongoing         |
    |           |             |           | observation of a resource |
    |           |             |           | or condition; delivers    |
    |           |             |           | updates via NOTIFY        |
    +-----------+-------------+-----------+---------------------------+
    | ROUTE     | Orchestrate | Permanent | Direct a task or message  |
    |           |             |           | to the appropriate        |
    |           |             |           | handler based on declared |
    |           |             |           | routing criteria          |
    +-----------+-------------+-----------+---------------------------+
    | RETRY     | Orchestrate | Permanent | Re-attempt a failed       |
    |           |             |           | invocation using its      |
    |           |             |           | original Task-ID for      |
    |           |             |           | idempotency checking      |
    +-----------+-------------+-----------+---------------------------+
    | PAUSE     | Orchestrate | Permanent | Temporarily halt a        |
    |           |             |           | scheduled or repeating    |
    |           |             |           | workflow without          |
    |           |             |           | terminating it            |
    +-----------+-------------+-----------+---------------------------+
    | RESUME    | Orchestrate | Permanent | Restart a paused workflow |
    |           |             |           | or suspended session      |
    |           |             |           | using a resumption nonce  |
    +-----------+-------------+-----------+---------------------------+
    | RUN       | Orchestrate | Permanent | Execute a registered      |
    |           |             |           | procedure by ID; free-    |
    |           |             |           | form execution strings    |
    |           |             |           | are prohibited            |
    +-----------+-------------+-----------+---------------------------+
    | CHECK     | Orchestrate | Permanent | Query the health or       |
    |           |             |           | availability of an agent, |
    |           |             |           | resource, or external     |
    |           |             |           | dependency                |
    +-----------+-------------+-----------+---------------------------+

                  Table 52: Tier 2 Method Registry Entries

12.  References



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12.1.  Normative References

   [AGIS]     Hood, C., "Agentic Grammar and Interface Specification
              (AGIS)", Work in Progress, Internet-Draft, draft-hood-
              independent-agis-00, 2026,
              <https://datatracker.ietf.org/doc/html/draft-hood-
              independent-agis-00>.

   [AGTP]     Hood, C., "Agent Transfer Protocol (AGTP)", Work in
              Progress, Internet-Draft, draft-hood-independent-agtp-03,
              2026, <https://datatracker.ietf.org/doc/html/draft-hood-
              independent-agtp-03>.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/rfc/rfc2119>.

   [RFC8126]  Cotton, M., Leiba, B., and T. Narten, "Guidelines for
              Writing an IANA Considerations Section in RFCs", BCP 26,
              RFC 8126, DOI 10.17487/RFC8126, June 2017,
              <https://www.rfc-editor.org/rfc/rfc8126>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/rfc/rfc8174>.

12.2.  Informative References

   [AGENTIC-API]
              Hood, C., "AgenticAPI: A Task-Centric Framework for
              Scalable Agent Integrations", 2025,
              <https://agenticapi.io>.

   [RFC6749]  Hardt, D., Ed., "The OAuth 2.0 Authorization Framework",
              RFC 6749, DOI 10.17487/RFC6749, October 2012,
              <https://www.rfc-editor.org/rfc/rfc6749>.

Author's Address

   Chris Hood
   Nomotic, Inc.
   Email: chris@nomotic.ai
   URI:   https://nomotic.ai







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