openapi: 3.2.0
info:
  title: iwant.fyi Agent MCP API
  description: Reference implementation of the iwant.fyi demand-side protocol v1.0. AI agents express structured purchase intent and receive matched supply across multiple sources. See https://iwant.fyi/protocol/v1 for the spec; the HTTP fallback under /v1/* mirrors the MCP demand.* tools.
  version: 0.20.3
  contact:
    email: hi@iwant.fyi
    url: https://iwant.fyi
  x-implements:
    specification: iwant.fyi demand-side protocol v1.0
    specUrl: https://iwant.fyi/protocol/v1
    conformance: v1.0+httpFallback
servers:
- url: https://iwant.fyi/api
  description: Production
security:
- AgentApiKey: []
tags:
- name: MCP
paths:
  /mcp:
    post:
      operationId: mcpEndpoint
      summary: MCP Server (JSON-RPC 2.0)
      description: 'Model Context Protocol endpoint. Methods: initialize, tools/list, tools/call. Auth via API key.'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - jsonrpc
              - method
              properties:
                jsonrpc:
                  type: string
                  enum:
                  - '2.0'
                method:
                  type: string
                  enum:
                  - initialize
                  - tools/list
                  - tools/call
                params:
                  type: object
                id:
                  oneOf:
                  - type: string
                  - type: integer
      responses:
        '200':
          description: JSON-RPC response
      tags:
      - MCP
components:
  securitySchemes:
    AgentApiKey:
      type: http
      scheme: bearer
      description: 'Agent API key (format: iwant_ak_...)'