openapi: 3.2.0
info:
  title: Merchant-0 A2A Protocol Server Subscription API
  description: Agent-to-Agent Commerce API for the 2026 Agentic Economy
  version: '2026.1'
tags:
- name: Subscription
paths:
  /api/subscription/referral-code:
    get:
      summary: Get Referral Code
      description: 'Issue / retrieve a subscriber''s referral code (Task 3.4).


        Public to the subscriber (auth = proven active subscription for the

        supplied DID, NOT a CEO token). Rule #11: only owner_did_hash returned.

        Idempotent: returns the existing code if one exists.'
      operationId: get_referral_code_api_subscription_referral_code_get
      parameters:
      - name: subscriber_did
        in: query
        required: false
        schema:
          type: string
          default: ''
          title: Subscriber Did
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                type: object
                title: Response Get Referral Code Api Subscription Referral Code Get
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Subscription
  /api/subscription/growth-stats:
    get:
      summary: Get Subscription Growth Stats
      description: 'CEO subscription growth + referral metrics (Task 3.6). Rule #11.'
      operationId: get_subscription_growth_stats_api_subscription_growth_stats_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 Subscription Growth Stats Api Subscription Growth Stats Get
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Subscription
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