FastMCP vs mcp-use: Python or TypeScript for Your MCP Server?

A common misconception puts these two on opposite sides of the protocol — “FastMCP builds servers, mcp-use runs clients.” That’s wrong. Both build MCP servers. The real axis is your language, and mcp-use adds something FastMCP doesn’t emphasize: interactive tool UIs.

The one-line difference

• FastMCP (Python, 27,090⭐) — wrap a function, get a tool. The de-facto Python standard, with servers, clients and interactive apps.
• mcp-use (TypeScript, 10,456⭐) — build, test and ship MCP servers, ChatGPT plugins and Claude connectors with fully typed Zod schemas, a built-in Inspector and native React Views.

Side by side

Dimension	FastMCP	mcp-use
Language	Python	TypeScript
What it builds	MCP servers, clients, interactive apps	MCP servers, ChatGPT plugins, Claude connectors
Typing	Type-hint driven schemas	Fully typed Zod schemas
Interactive tool UIs	Apps (conversation-rendered)	Native React Views
Tooling	Docs at gofastmcp.com	Built-in Inspector, deploy via manufact.com
Tie to official SDK	FastMCP 1.0 was folded into the official Python SDK	Independent TypeScript framework

When to pick FastMCP

Your stack is Python, or you want the largest ecosystem and community. FastMCP is the fastest path from “I have a Python function” to “my agent can call it” — schema, validation and docs are generated from type hints. It also covers clients and conversation-rendered Apps.

When to pick mcp-use

Your stack is TypeScript, or you want interactive tool UIs. mcp-use gives you fully typed schemas (Zod), a built-in Inspector for debugging, and React Views that render inside the conversation — useful when a tool’s output is better shown as a UI than text. It also ships ChatGPT plugins and Claude connectors, not just MCP servers.

The honest answer

They are not competitors in the “server vs client” sense — both build servers. Pick by language first: Python → FastMCP, TypeScript → mcp-use. If you’re deciding on ecosystem depth, FastMCP has the bigger community; if interactive tool UIs matter to you, mcp-use’s React Views are the standout feature.

Verdict

Language decides it. Python shop → FastMCP. TypeScript shop, or you want typed schemas plus interactive tool UIs → mcp-use. Skip the “server vs agent” framing — it doesn’t apply to either.

The data-backed comparison lives on the FastMCP vs mcp-use page.