mcp-use

An open-source MCP framework builds self-hosted servers and interactive apps for ChatGPT and Claude, with React views and built-in debugging tools.

mcp-use is a TypeScript framework for developers building MCP servers and apps for ChatGPT, Claude, and AI agents. It brings tool definitions, interactive interfaces, and testing into one development framework.

Interactive apps: Attach React views to tools so users can work with charts, maps, and other interfaces inside ChatGPT.
Typed tools and results: Use shared Zod schemas for tool inputs, structured outputs, and view data to keep the server and interface consistent.
Inspection and testing: Call tools, check inputs, inspect views, and capture screenshots through the browser Inspector or command-line tools.
Clients and agents: Connect to MCP servers from Node.js, browsers, or React, and build model-powered agents with the companion client and agent packages.
Local testing with AI services: A managed tunnel exposes a local server through a public URL for testing with ChatGPT and Claude before deployment.

The framework is open source under the MIT license. Servers can run locally or on your own infrastructure. Manufact provides a separate hosted deployment option with observability, analytics, evaluations, and Git-based preview environments. The managed tunnel uses an external relay, and testing through ChatGPT or Claude involves those services. Python packages also support building MCP servers, clients, and agents.