I Built a Tool That Turns Any API Into Something Your MCP Client Can Use

Hey folks 👋 I've been deep in the AI tooling world lately, and I kept running into the same annoying problem: connecting LLMs to existing APIs is way harder than it should be. Every time I wanted an LLM to call a REST API, I had to write a custom MCP server from scratch. Define the tools. Map the parameters. Handle auth. Wire up the HTTP calls. Over and over again. So I built something to fix that. Meet mcp-server-openapi mcp-server-openapi is an open-source Go CLI that automatically converts your OpenAPI spec into MCP tools. If your API has an OpenAPI doc (and let's be honest, most do), you can expose it to any MCP client — Claude Desktop, Cursor, VS Code, you name it — in about 30 seconds. No boilerplate. No hand-wiring. Just point it at your spec and go. mcp-server-openapi --spec ./your-api.yaml That's it. Your API endpoints are now tools that any MCP client can call. Wait, What's MCP? If you're new to this — Model Context Protocol (MCP) is an open standard that lets AI assistants