openapi: 3.1.0
info:
  title: Smithery connect connect.mcp API
  version: 1.0.0
  description: Connect to MCP servers hosted on Smithery without managing OAuth, credentials, or sessions. Create stateless connections to any MCP server, execute MCP JSON-RPC, list/call tools and triggers, and manage subscriptions for trigger events.
servers:
- url: https://api.smithery.ai
tags:
- name: connect.mcp
paths:
  /connect/{namespace}/{connectionId}/mcp:
    post:
      operationId: post:namespace:connectionIdMcp
      tags:
      - connect.mcp
      summary: MCP endpoint
      description: Stateless MCP endpoint using Streamable HTTP transport. Accepts JSON-RPC requests and notifications. Session management is handled internally by Connect—clients should not send mcp-session-id headers. Requires service token with mcp scope.
      responses:
        '200':
          description: JSON-RPC response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcResponse'
        '202':
          description: Notification accepted
        '400':
          description: Invalid request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '401':
          description: Authorization required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AuthRequiredError'
        '404':
          description: Connection not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '405':
          description: Method not allowed (stateless mode)
        '409':
          description: Input required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InputRequiredError'
        '500':
          description: Internal error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '502':
          description: Upstream error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
      parameters:
      - schema:
          type: string
        in: path
        name: namespace
        required: true
      - schema:
          type: string
        in: path
        name: connectionId
        required: true
components:
  schemas:
    InputRequiredError:
      type: object
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          anyOf:
          - type: string
          - type: number
          - type: 'null'
        error:
          type: object
          properties:
            code:
              type: number
              const: -32002
            message:
              type: string
              const: Input required
            data:
              type: object
              properties:
                http:
                  $ref: '#/components/schemas/CredentialProfileHttp'
                missing:
                  type: object
                  properties:
                    headers:
                      type: array
                      items:
                        type: string
                    query:
                      type: array
                      items:
                        type: string
                  required:
                  - headers
                  - query
                  additionalProperties: false
              required:
              - http
              - missing
              additionalProperties: false
          required:
          - code
          - message
          - data
          additionalProperties: false
      required:
      - jsonrpc
      - id
      - error
      additionalProperties: false
    HttpInputField:
      type: object
      properties:
        label:
          type: string
        description:
          type: string
        required:
          type: boolean
      required:
      - label
      additionalProperties: false
      id: HttpInputField
    JsonRpcError:
      type: object
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          anyOf:
          - type: string
          - type: number
          - type: 'null'
        error:
          type: object
          properties:
            code:
              type: number
              example: -32600
            message:
              type: string
              example: Invalid Request
            data: {}
          required:
          - code
          - message
          additionalProperties: false
      required:
      - jsonrpc
      - id
      - error
      additionalProperties: false
    JsonRpcResponse:
      type: object
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          anyOf:
          - type: string
          - type: number
          - type: 'null'
        result: {}
      required:
      - jsonrpc
      - id
      additionalProperties: false
    AuthRequiredError:
      type: object
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          anyOf:
          - type: string
          - type: number
          - type: 'null'
        error:
          type: object
          properties:
            code:
              type: number
              const: -32001
            message:
              type: string
              const: Authorization required
            data:
              type: object
              properties:
                authorizationUrl:
                  type: string
                  format: uri
              required:
              - authorizationUrl
              additionalProperties: false
          required:
          - code
          - message
          - data
          additionalProperties: false
      required:
      - jsonrpc
      - id
      - error
      additionalProperties: false
    CredentialProfileHttp:
      type: object
      properties:
        headers:
          type: object
          propertyNames:
            type: string
          additionalProperties:
            $ref: '#/components/schemas/HttpInputField'
        query:
          type: object
          propertyNames:
            type: string
          additionalProperties:
            $ref: '#/components/schemas/HttpInputField'
      additionalProperties: false
      id: CredentialProfileHttp
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: Smithery API key as Bearer token