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MCP Server from OpenAPI

@rajeshm7910

Repository

Basic information

Category

Other

License

Apache-2.0 license

Transports

stdio

Author

rajeshm7910

About MCP Server from OpenAPI

No overview available yet

#mcp-server#openapi#api-server

MCP Server from OpenAPI config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "mcp-server-from-openapi": {
      "command": "python3",
      "args": [
        "-m",
        "venv",
        "venv"
      ]
    }
  }
}

MCP Server from OpenAPI tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is MCP Server from OpenAPI?

MCP Server from OpenAPI is a Model Context Protocol (MCP) server implementation that generates endpoints from OpenAPI specifications, supporting both Server-Sent Events (SSE) and streaming responses. It is designed for developers who want to interact with APIs through MCP clients or Google ADK agents using natural language queries.

How to use MCP Server from OpenAPI?

Install Python 3.x and pip, create a virtual environment, and run pip install -r requirements.txt. Start the server in SSE mode (python server/mcp_server_sse.py --spec <file> --name <name> --base-url <url>) or streaming mode (python server/mcp_server_stream.py ...). Then launch either the SSE client (python client/sse_client.py) or streaming client (python client/stream_client.py). For ADK agents, install google-adk, replace a mcp_session_manager.py file, and configure .env files with the appropriate API keys.

Key features of MCP Server from OpenAPI

  • OpenAPI specification-based endpoint generation
  • Support for both SSE and streaming responses
  • Multiple client implementations (MCP and ADK)
  • Easy configuration through environment variables
  • Example usage with httpbin.org API

Use cases of MCP Server from OpenAPI

  • Query an API (e.g., get headers) using natural language through an MCP client
  • Build agentic workflows with Google ADK agents that call REST APIs
  • Rapidly prototype API interactions without writing custom client code
  • Test and debug OpenAPI specifications with a live server

Frequently asked questions

1

What are the prerequisites for using this server?

Python 3.x, pip, and an Anthropic API key (for MCP clients) or a Google API key (for ADK agents). The server also requires the dependencies listed in `requirements.txt`.

2

How do I run the server in SSE mode?

Run `python server/mcp_server_sse.py --spec server/httpbin_openapi.yaml --name httpbin --base-url https://httpbin.org`. Replace the spec file, name, and base URL with your own values.

3

How do I set up ADK agents with this server?

Install ADK (`pip install google-adk`), download the latest `mcp_session_manager.py` from the Google ADK repository and replace the existing file in your ADK installation. Then create `.env` files in the agent directories with `GOOGLE_GENAI_USE_VERTEXAI="False"` and `GOOGLE_API_KEY="your_key"`. Start the ADK web interface with `adk web`.

4

What should I do if ADK streaming mode has issues?

Verify you have replaced the `mcp_session_manager.py` file, check that your Google API key is correctly set in the `.env` files, and ensure you are using the latest version of ADK.

5

Can I use this server with APIs other than httpbin?

Yes, you can provide any OpenAPI specification file using the `--spec` flag and set the appropriate base URL with `--base-url`.

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