openapi: 3.2.0
info:
  title: Merchant-0 A2A Protocol Server Discovery API
  description: Agent-to-Agent Commerce API for the 2026 Agentic Economy
  version: '2026.1'
tags:
- name: Discovery
paths:
  /api/discovery/hit:
    post:
      summary: Post Discovery Hit
      description: 'Fire-and-forget discovery hit logger (Task 2.1). Never raises.


        Called server-side by the Next.js .well-known dynamic routes, so it

        has no auth. Must be fast: one INSERT, no further processing.

        Rule #9: statement_cache_size=0. Rule #11: no buyer_did, no IP.'
      operationId: post_discovery_hit_api_discovery_hit_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DiscoveryHitBody'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                type: object
                title: Response Post Discovery Hit Api Discovery Hit Post
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Discovery
  /api/discovery/funnel:
    get:
      summary: Get Discovery Funnel
      description: 'CEO discovery funnel (Task 2.2). Rule #11: no buyer_did.'
      operationId: get_discovery_funnel_api_discovery_funnel_get
      parameters:
      - name: sandbox_token
        in: query
        required: false
        schema:
          type: string
          default: ''
          title: Sandbox Token
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                type: object
                title: Response Get Discovery Funnel Api Discovery Funnel Get
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Discovery
  /api/discovery/registry-package:
    get:
      summary: Get Discovery Registry Package
      description: CEO registry submission package (Task 2.3).
      operationId: get_discovery_registry_package_api_discovery_registry_package_get
      parameters:
      - name: sandbox_token
        in: query
        required: false
        schema:
          type: string
          default: ''
          title: Sandbox Token
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                type: object
                title: Response Get Discovery Registry Package Api Discovery Registry Package Get
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Discovery
components:
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    DiscoveryHitBody:
      properties:
        endpoint:
          type: string
          title: Endpoint
          default: ''
        user_agent:
          anyOf:
          - type: string
          - type: 'null'
          title: User Agent
        referer:
          anyOf:
          - type: string
          - type: 'null'
          title: Referer
      type: object
      title: DiscoveryHitBody
      description: 'POST /api/discovery/hit body (codebase BaseModel convention).


        Called fire-and-forget by the Next.js .well-known dynamic routes. No

        auth, no buyer_did, no IP -- discovery precedes identity (Rule #11).'