Open-Source SDK for MCP Apps and Servers | Manufact

The open-source SDK for MCP Apps and Servers

The mcp-use SDK is the fullstack MCP framework to develop MCP Apps for ChatGPT / Claude & MCP Servers for AI Agents.Loved by developers.

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One MCP server, two surfaces

mcp-use is designed around the MCP standard from both sides of the wire. Ship MCP Apps to AI chats. Ship MCP servers to AI agents. Write once.

MCP Apps for ChatGPT & Claude

Drop React widgets in resources/. They auto-register as tools that render directly in chat clients.

Read the MCP Apps guide

MCP Servers for AI agents

Expose your API, database, or internal tools to any AI or coding agent with a single mcp-use server.

Read the Server guide

Example Code for MCP Server Creation

import { createMCPServer } from 'mcp-use/server'

// The MCP Inspector is automatically mounted at /inspector
const server = createMCPServer('my-mcp-server', {
    version: '1.0.0',
    description: 'An MCP server with MCP Apps support for ChatGPT or Claude',
    baseUrl: process.env.MCP_URL,
})

Two languages, one API

Available in TypeScript and Python

The mcp-use server API is identical in both languages. Pick the language your team prefers.

Why mcp-use

Why developers pick mcp-use for MCP Servers.

A fullstack framework for MCP Servers. Widgets, dev server, Inspector, and cloud deploy bundled in one package.

Tool + widget in one file

Declare a React widget directly on the tool. The useWidget hook handles props, theme, and pending state, no separate ui:// resource to register.

Inspector built in

mcp-use dev runs the server with hot reload and opens an interactive Inspector at /inspector. Test tools, preview widgets, and watch JSON-RPC live.

One-command scaffold

npx create-mcp-use-app generates a typed MCP server, a resources/ folder of React widgets, auth, and a working example.

All transports out of the box

STDIO, HTTP, SSE, WebSocket. Same code, every transport.

One-click cloud deploy

Connect a GitHub repo. Branch deploys, logs, metrics, and observability come with Manufact Cloud.

Join MCP community

Get help, share your projects, and get inspired.

The community for developers building with MCP and mcp-use.