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openapi2mcp

Turn any OpenAPI spec into a Model Context Protocol server with one command.

<img src="demo.gif" alt="Demo" width="700" />

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🎯 Why?

MCP is exploding, but every REST API still needs a hand-written MCP server. OpenAPI specs already describe tools, parameters, and schemas, so there is a missing zero-config bridge that turns existing API contracts into MCP tools for Claude, Cursor, and other agents.

Target audience: AI application developers and platform engineers who want coding agents to call internal or public REST APIs without writing bespoke MCP servers.

✨ Features

• ✨ Generates MCP tools from OpenAPI paths and schemas
• ✨ Runs a minimal MCP stdio server with tools/list and tools/call
• ✨ Supports default auth headers, method allowlists, and base URL overrides

🚀 Quick Start

# Install
pip install openapi2mcp

# Run
openapi2mcp --help

📦 Installation

From Source

git clone https://github.com/YOUR_USERNAME/openapi2mcp.git
cd openapi2mcp

# Create virtual environment
python -m venv .venv
source .venv/bin/activate  # Windows: .venv\Scripts\activate

# Install in development mode
pip install -e ".[dev]"

# Run tests
pytest -v

🎬 Demo

The GIF above was recorded using Charm VHS:

vhs < demo.tape

📖 Usage

# Show help
openapi2mcp --help

# Common usage examples
openapi2mcp --example

🏗️ Architecture

graph LR
    A[Input] --> B[Core Engine]
    B --> C[Output]
    B --> D[Plugins]
    D --> E[Extensions]

🤝 Contributing

Contributions are welcome! Please:

1. Fork the repo
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📄 License

MIT © 2026 — See LICENSE for details.

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