Introduction
A hub for Model Context Protocol servers — what MCP is, and which servers are documented here.
What is MCP?
The Model Context Protocol (MCP) is a standard way for an AI client — Claude Desktop, Claude Code, an IDE assistant — to call out to tools it doesn't have built in.
An MCP server is not a website and it isn't "hosted" anywhere. It's a small local process. The client spawns it, usually as a single command (python server.py, npx some-server, etc.), and talks to it over stdio: JSON-RPC messages passed through the process's stdin/stdout. There's no port, no URL, no uptime to worry about. When you close the client or end the session, the process dies with it. Open the client again, and it spawns a fresh one.
That's the whole model: point your client at a command, and it gains new tools, prompts, or resources for that session.