> ## Documentation Index
> Fetch the complete documentation index at: https://docs.adcontextprotocol.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Publisher lookup

> Given a domain, returns the inventory this entity publishes and which agents it authorizes.



## OpenAPI

````yaml https://raw.githubusercontent.com/adcontextprotocol/adcp/v3.0.26/static/openapi/registry.yaml get /api/registry/publisher
openapi: 3.1.0
info:
  title: AgenticAdvertising.org Registry API
  description: >-
    REST API for the AgenticAdvertising.org registry. Resolve brands,

    discover properties, look up agents, and validate authorization in the

    AdCP ecosystem.


    Most endpoints are public and require no authentication. Endpoints marked

    with a lock icon accept either an organization API key or a user JWT

    obtained via the OAuth 2.1 flow — see
    [Authentication](https://agenticadvertising.org/docs/registry/index#authentication).


    **Base URL:** `https://agenticadvertising.org`
  version: 1.0.0
  contact:
    name: AgenticAdvertising.org
    url: https://agenticadvertising.org
servers:
  - url: https://agenticadvertising.org
    description: Production
security: []
tags:
  - name: Brand Resolution
    description: Resolve advertiser domains to canonical brand identities.
  - name: Property Resolution
    description: >-
      Resolve publisher domains to their property configurations and authorized
      agents.
  - name: Agent Discovery
    description: >-
      Browse the federated agent network, search agent inventory profiles,
      publisher index, and registry statistics.
  - name: Change Feed
    description: Poll cursor-based registry change events for local sync.
  - name: Lookups & Authorization
    description: >-
      Look up agents by domain or property, and validate ad-serving
      authorization.
  - name: Validation Tools
    description: >-
      Validate publisher adagents.json files and generate compliant
      configurations.
  - name: Search
    description: Cross-entity search across brands, publishers, agents, and properties.
  - name: Agent Probing
    description: >-
      Connect to live agents and inspect their capabilities, formats, and
      inventory.
  - name: Brand Discovery
    description: Discover and crawl brand.json files across domains.
  - name: Agent Compliance
    description: Agent compliance status, storyboard test results, and compliance history.
  - name: Policy Registry
    description: >-
      Browse, resolve, and contribute governance policies for campaign
      compliance.
paths:
  /api/registry/publisher:
    get:
      tags:
        - Lookups & Authorization
      summary: Publisher lookup
      description: >-
        Given a domain, returns the inventory this entity publishes and which
        agents it authorizes.
      operationId: lookupPublisher
      parameters:
        - schema:
            type: string
            example: voxmedia.com
          required: true
          name: domain
          in: query
      responses:
        '200':
          description: Publisher lookup result
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PublisherLookupResult'
        '400':
          description: Missing domain
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    PublisherLookupResult:
      type: object
      properties:
        domain:
          type: string
          example: voxmedia.com
        member:
          type:
            - object
            - 'null'
          properties:
            slug:
              type: string
            display_name:
              type: string
        adagents_valid:
          type:
            - boolean
            - 'null'
        properties:
          type: array
          items:
            type: object
            properties:
              id:
                type: string
              type:
                type: string
              name:
                type: string
              identifiers:
                type: array
                items:
                  $ref: '#/components/schemas/PropertyIdentifier'
              tags:
                type: array
                items:
                  type: string
        authorized_agents:
          type: array
          items:
            type: object
            properties:
              url:
                type: string
              authorized_for:
                type: string
              source:
                type: string
                enum:
                  - adagents_json
                  - agent_claim
            required:
              - url
              - source
      required:
        - domain
        - member
        - adagents_valid
        - properties
        - authorized_agents
    Error:
      type: object
      properties:
        error:
          type: string
      required:
        - error
    PropertyIdentifier:
      type: object
      properties:
        type:
          type: string
          example: domain
        value:
          type: string
          example: examplepub.com
      required:
        - type
        - value

````