openapi: 3.2.0
info:
  title: IAB Agentic Advertising Registry API
  version: 0.1.0
  description: 'Canonical wire protocol between the IAB Tech Lab buyer and seller agents: catalog, quote->book deal flow, negotiation, change requests, A2A (Agent-to-Agent protocol) JSON-RPC messaging, and Agent Card discovery.'
tags:
- name: Registry
paths:
  /registry/agents/discover:
    post:
      operationId: discoverAgent
      summary: Fetch and register a counterparty's card by base URL
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: ../jsonschema/protocol/AgentDiscoveryRequest.json
      responses:
        '200':
          description: Registry-verified trust result for the agent.
          content:
            application/json:
              schema:
                $ref: ../jsonschema/protocol/AgentTrustVerification.json
        '404':
          $ref: '#/components/responses/Error'
      tags:
      - Registry
components:
  responses:
    Error:
      description: 'Structured error envelope: {"detail": {"error": <ErrorCode>, "message": "...", "unsupported": [...]}}.'
      content:
        application/json:
          schema:
            $ref: ../jsonschema/protocol/ErrorEnvelope.json