IAB Tech Lab Agent Registry API

openapi: 3.2.0
info:
  title: Ad Seller System Agent Registry API
  description: IAB OpenDirect 2.1 compliant seller agent for programmatic advertising. Supports product discovery, tiered pricing, proposal evaluation, multi-round negotiation, deal execution, order management, and change requests.
  contact:
    name: IAB Tech Lab
    url: https://iabtechlab.com/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
  version: 1.0.0
tags:
- name: Agent Registry
  description: A2A agent discovery and trust management
paths:
  /.well-known/agent.json:
    get:
      tags:
      - Agent Registry
      summary: Agent Card
      description: 'Serve this seller agent''s card for A2A discovery.


        Returns an A2A-protocol-compliant agent card describing this

        seller''s capabilities, supported protocols, and inventory types.

        Buyer agents and registries fetch this to discover the seller.'
      operationId: agent_card__well_known_agent_json_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
  /registry/agents:
    get:
      tags:
      - Agent Registry
      summary: List Registered Agents
      description: 'List agents in the local registry.


        Filterable by agent_type (buyer, seller, tool_provider, data_provider, other)

        and trust_status (unknown, registered, approved, preferred, blocked).'
      operationId: list_registered_agents_registry_agents_get
      parameters:
      - name: agent_type
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Agent Type
      - name: trust_status
        in: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Trust Status
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /registry/agents/{agent_id}:
    get:
      tags:
      - Agent Registry
      summary: Get Registered Agent
      description: Get details for a specific registered agent.
      operationId: get_registered_agent_registry_agents__agent_id__get
      parameters:
      - name: agent_id
        in: path
        required: true
        schema:
          type: string
          title: Agent Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
    delete:
      tags:
      - Agent Registry
      summary: Remove Registered Agent
      description: Remove an agent from the local registry.
      operationId: remove_registered_agent_registry_agents__agent_id__delete
      parameters:
      - name: agent_id
        in: path
        required: true
        schema:
          type: string
          title: Agent Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /registry/agents/discover:
    post:
      tags:
      - Agent Registry
      summary: Discover Agent
      description: 'Discover an agent by URL.


        Fetches the agent''s card from .well-known/agent.json, checks

        all configured registries (AAMP + extras) for verification, and

        registers the agent locally with appropriate trust status.'
      operationId: discover_agent_registry_agents_discover_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DiscoverAgentRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /registry/agents/{agent_id}/trust:
    put:
      tags:
      - Agent Registry
      summary: Update Agent Trust
      description: 'Update an agent''s trust status.


        Use this to approve, prefer, or block agents. Trust status determines

        the maximum access tier:

        - unknown → PUBLIC (price ranges only)

        - registered → SEAT (exact prices, no negotiation)

        - approved → ADVERTISER (full access)

        - preferred → ADVERTISER + custom pricing rules

        - blocked → 403 rejected, zero data access'
      operationId: update_agent_trust_registry_agents__agent_id__trust_put
      parameters:
      - name: agent_id
        in: path
        required: true
        schema:
          type: string
          title: Agent Id
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateTrustRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    DiscoverAgentRequest:
      properties:
        agent_url:
          type: string
          title: Agent Url
      type: object
      required:
      - agent_url
      title: DiscoverAgentRequest
      description: Request to discover an agent by URL.
    UpdateTrustRequest:
      properties:
        trust_status:
          type: string
          title: Trust Status
        notes:
          anyOf:
          - type: string
          - type: 'null'
          title: Notes
      type: object
      required:
      - trust_status
      title: UpdateTrustRequest
      description: Request to update an agent's trust status.