Which OpenAPI versions are supported?

MCP-OpenAPI supports OpenAPI versions 3.0 and 3.1, in both JSON and YAML formats.

How does authentication work?

MCP-OpenAPI allows you to use a global authentication token (bearer or basic) for API requests, configured via the `--auth-token` option.

How do I configure MCP-OpenAPI?

You can configure the server using command-line arguments or environment variables, including options for the FastMCP server (host, port, debug mode, log level) and a global auth token.

Can I restrict which endpoints are exposed as tools?

While not fully implemented yet, future versions aim to allow restricting exposed endpoints by path patterns, HTTP method, explicit listing, or OpenAPI tags.

OpenAPI

Name: OpenAPI
Author: rmasters

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Exposes HTTP methods from an OpenAPI specification as tools for Model Context Protocol (MCP) servers.

OpenAPI allows you to create a Model Context Protocol (MCP) server that uses an OpenAPI spec to define its available tools. It fetches and parses the OpenAPI specification, registers each path-operation as a tool, and starts a FastMCP server. This enables clients to request these tools, triggering HTTP requests to the API and returning the responses, effectively bridging OpenAPI defined APIs with the Model Context Protocol.

主な機能

01Resolves references to external specs.

02Can use a global auth token for API requests.

03Supports OpenAPI 3.0 and 3.1 specifications.

04Offers configuration options for the FastMCP server (host, port, debug mode, log level).

05Works with JSON and YAML formats.

062 GitHub stars

ユースケース

01Quickly expose API functionality as tools for LLMs.

02Integrate existing APIs defined by OpenAPI specs into MCP workflows.

03Create custom tools for LLMs based on specific API endpoints.