{"data":{"slug":"fastmcp","name":"FastMCP","tagline":"Apache-2.0 framework to build MCP servers/clients/apps","category":"agents","categoryName":"AI Agents","url":"https://gofastmcp.com","github":"https://github.com/PrefectHQ/fastmcp","pricing":"open-source","hook":"FastMCP is the Python framework for building MCP applications — not a catalog of live MCP servers you install.","whatsGood":"Apache-2.0 (Prefect). @mcp.tool → schema, validation, transports (stdio/streamable-http). Servers, clients, and interactive apps in one API. Powers a large share of Python MCP servers; TypeScript sibling exists. Horizon is the optional paid enterprise gateway for registry/SSO/RBAC — not required to build.","theCatch":"Build MCP apps ≠ use live MCP servers. Distinct from Playwright MCP / Context7 / Serena (capability servers) and from SuperGateway (transport glue). Horizon paid optional for ops at scale; day-one path is OSS FastMCP alone.","verdict":"Apache-2.0 MCP framework. Ship servers with it; do not confuse it with a tool marketplace.","addedAt":"2026-09-08","featured":false,"domain":"AI Agents","subSpecialty":"MCP","subcategory":"MCP","tags":["mcp","sdk","self-host","permissive","active"],"capabilities":["mcp","sdk","framework"],"surfaces":["MCP","SDK","Self-host"],"ecosystem":["Python"],"licenseModel":"Apache-2.0","githubStars":28131,"starsPerWeek":286,"access":"free","archived":false,"repo":{"createdAt":"2024-11-30","pushedAt":"2026-10-18","license":"Apache-2.0","archived":false,"checkedAt":"2026-10-19"}},"related":[{"slug":"claude-code","name":"Claude Code","tagline":"Terminal-first coding agent with deep repository context"},{"slug":"cursor","name":"Cursor","tagline":"The AI-first code editor that understands your codebase"},{"slug":"devin","name":"Devin","tagline":"Autonomous AI engineer for defined engineering tasks"},{"slug":"stagehand","name":"Stagehand","tagline":"AI-native browser automation that mixes code and natural language"},{"slug":"browser-use","name":"Browser Use","tagline":"Open-source framework for LLM-driven browser agents"}],"links":{"self":"/api/gems/fastmcp","html":"/gems/fastmcp","markdown":"/gems/fastmcp.md","category":"/api/gems?category=agents","categoryPage":"/stacks/agents"}}