OpenAPI MCP Server

Overview

• This project will install MCP - Model Context Protocol Server, that provides configured REST API's as context to LLM's.

• Using this we can enable LLMs to interact with RestAPI's and perform REST API call's using LLM prompts.

• Currently we support HTTP API Call's GET/PUT/POST/PATCH.

Related MCP server: MCP OpenAPI Server

Installation

• Install package

  pip install openapi_mcp_server

• Create .env in a folder with minimum values for OPENAPI_SPEC_PATH & API_BASE_URL. Sample file available here

• Test openapi_mcp_server server using uv run openapi_mcp_server from the above folder.

Claud Desktop

• Configuration details for Claud Desktop

  {
    "mcpServers": {
      "openapi_mcp_server":{
        "command": "uv",
        "args": ["run","openapi_mcp_server"]
        "env": {
            "DEBUG":"1",
            "API_BASE_URL":"https://petstore.swagger.io/v2",
            "OPENAPI_SPEC_PATH":"https://petstore.swagger.io/v2/swagger.json",
            "API_HEADERS":"Accept:application/json",
            "API_WHITE_LIST":"addPet,updatePet,findPetsByStatus"
        }
      }
    }
  }

  

Configuration

• List of available environment variables

  • DEBUG: Enable debug logging (optional default is False)

  • OPENAPI_SPEC_PATH: Path to the OpenAPI document. (required)

  • API_BASE_URL: Base URL for the API requests. (required)

  • API_HEADERS: Headers to include in the API requests (optional)

  • API_WHITE_LIST: White Listed operationId in list format ["operationId1", "operationId2"] (optional)

  • API_BLACK_LIST: Black Listed operationId in list format ["operationId3", "operationId4"] (optional)

  • HTTP_PROXY: HTTP Proxy details (optional)

  • HTTPS_PROXY: HTTPS Proxy details (optional)

  • NO_PROXY: No Proxy details (optional)

Contributing

Contributions are welcome.
Please feel free to submit a Pull Request.

License

This project is licensed under the terms of the MIT license.

Github Stars

Appendix

UV

mkdir -m777 openapi_mcp_server
cd openapi_mcp_server
uv init
uv add mcp[cli] pydantic python-dotenv requests
uv add --dev twine setuptools
uv sync
uv run openapi_mcp_server
uv build
pip install --force-reinstall --no-deps .\dist\openapi_mcp_server-*fileversion*.whl
export TWINE_USERNAME="rahgadda"
export TWINE_USERNAME="<<API Key>>"
uv run twine upload --verbose dist/*

Reference

• UV Overview