openapi: 3.2.0
info:
  title: Merchant-0 A2A Protocol Server MCP API
  description: Agent-to-Agent Commerce API for the 2026 Agentic Economy
  version: '2026.1'
tags:
- name: MCP
paths:
  /api/mcp/manifest:
    get:
      summary: Get Mcp Manifest
      description: 'MCP Server manifest for LLM integration.


        Describes available tools and resources for LLMs.'
      operationId: get_mcp_manifest_api_mcp_manifest_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
      tags:
      - MCP
  /api/mcp/tools:
    get:
      summary: List Mcp Tools
      description: List available MCP tools.
      operationId: list_mcp_tools_api_mcp_tools_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
      tags:
      - MCP
  /api/mcp/resources:
    get:
      summary: List Mcp Resources
      description: List available MCP resources.
      operationId: list_mcp_resources_api_mcp_resources_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
      tags:
      - MCP
  /api/mcp/inventory/search:
    post:
      summary: Mcp Inventory Search
      description: 'MCP Tool: search_inventory


        Natural language product search optimized for LLM understanding.'
      operationId: mcp_inventory_search_api_mcp_inventory_search_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/MCPInventoryQuery'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - MCP
  /api/mcp/categories:
    get:
      summary: Get Categories
      description: Get available product categories.
      operationId: get_categories_api_mcp_categories_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
      tags:
      - MCP
  /api/mcp/capabilities:
    get:
      summary: Get Mcp Capabilities Alias
      description: 'Alias of /api/mcp/manifest.


        Returns the same MCPInventoryServer manifest under the MP-specified

        path so agent SDKs written against /api/mcp/capabilities succeed.'
      operationId: get_mcp_capabilities_alias_api_mcp_capabilities_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
      tags:
      - MCP
components:
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    MCPInventoryQuery:
      properties:
        search_term:
          anyOf:
          - type: string
          - type: 'null'
          title: Search Term
          description: Natural language search term
        category:
          anyOf:
          - type: string
          - type: 'null'
          title: Category
          description: Product category filter
        min_price:
          anyOf:
          - type: number
          - type: string
          - type: 'null'
          title: Min Price
          description: Minimum price filter
        max_price:
          anyOf:
          - type: number
          - type: string
          - type: 'null'
          title: Max Price
          description: Maximum price filter
        in_stock_only:
          type: boolean
          title: In Stock Only
          description: Only return in-stock items
          default: true
        limit:
          type: integer
          maximum: 100.0
          minimum: 1.0
          title: Limit
          description: Maximum results to return
          default: 10
        include_attributes:
          type: boolean
          title: Include Attributes
          description: Include detailed attributes
          default: true
      type: object
      title: MCPInventoryQuery
      description: 'Query from LLM about inventory.


        Supports natural language search, category filtering,

        price ranges, and stock availability checks.'
    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