OpenAPI MCP Server

A Model Context Protocol (MCP) server for Claude/Cursor that enables searching and exploring OpenAPI specifications through oapis.org.

• Demo: https://x.com/janwilmake/status/1903497808134496583
• HN Thread: https://news.ycombinator.com/item?id=43447278
• OpenAPISearch: https://github.com/janwilmake/openapisearch
• OAPIS: https://github.com/janwilmake/oapis

The MCP works by applying a 3 step process:

1. It figures out the openapi identifier you need
2. It requests a summary of that in simple language
3. It determines which endpoints you need, and checks out how exactly they work (again, in simple language)

Features

• Get an overview of any OpenAPI specification
• Retrieve details about specific API operations
• Support for both JSON and YAML formats
• Tested with Claude Desktop and Cursor

Installation

For other clients, use MCP URL: https://openapi-mcp.openapisearch.com/mcp

Local testing

First run the server

wrangler dev

Then run the mcp inspector:

npx @modelcontextprotocol/inspector