openapi: 3.2.0
info:
  title: Powerduck MCP reference example
  version: 1.0.0
  description: 'Official example, not a hosted API. Local services must be started separately.'
servers:
  - url: 'http://127.0.0.1:8080'
tags:
  - name: mcp
paths:
  /mcp/tools/echo:
    post:
      operationId: mcp_echo
      summary: mcp echo
      description: >-
        Official Powerduck example definition. Replace the example endpoint with your own service
        before sending.
      tags:
        - mcp
      x-protocol: mcp
      x-session: true
      x-mcp:
        endpoint: 'http://127.0.0.1:3000/mcp'
        transport: streamable-http
        method: tools/call
        name: echo
        argumentsSchema:
          type: object
          properties:
            message:
              type: string
          required:
            - message
        arguments:
          message: Hello
        responseSchema:
          type: object
          properties:
            content:
              type: array
              items:
                type: object
                properties:
                  type:
                    const: text
                  text:
                    type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                type: object
                properties:
                  content:
                    type: array
                    items:
                      type: object
                      properties:
                        type:
                          const: text
                        text:
                          type: string
              example:
                content:
                  - type: text
                    text: Hello
                isError: false
components:
  schemas:
    Message:
      type: object
      required:
        - message
      properties:
        message:
          type: string
        id:
          type: string