OpenAPI Proxy MCP Server

Exposes REST APIs defined by OpenAPI specifications as Model Context Protocol (MCP) tools, facilitating seamless integration into MCP-based workflows.

What it actually does

See the client matrix for attach mechanisms, models, and exact results.

• Dynamic Tool Generation: — Automatically creates MCP tools from OpenAPI endpoint definitions
• Simple Mode Option: — Offers a static configuration alternative via FastMCP mode
• OpenAPI Specification Support: — Compatible with OpenAPI v3 with potential support for v2
• Flexible Filtering: — Allows endpoint filtering through whitelisting by paths or other criteria
• Payload Authentication: — Supports custom authentication via JMESPath expressions (e.g. for APIs like Slack that expect tokens in the payload not the HTTP header)
• Header Authentication: — Uses Bearer by default for API_KEY in the Authorization header, customizable for APIs like Fly.io requiring Api-Key

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.