mcp-use

A popular open library for connecting any LLM to any MCP server and building custom agents with tool access - the fastest path from zero to a working MCP-tool-using agent, with support for multi-server clients and restricted tool sets.

View source on GitHub

Key takeaways

• 01

  Fastest on-ramp: any LLM + any MCP server in a few lines

• 02

  Restricting available tools per agent is built in - use it

• 03

  Multi-server clients let one agent span tool domains

Flows built on this research

MCP & Tooling

Build Your First MCP Server

Stand up a working MCP server exposing your own tools, connect a client, and validate the full call loop.

4 steps · 90-120 minutes

MCP & Tooling

Deferred Tool Loading

Stop paying context for tools the task never needs: load a core set eagerly and expand the toolset on demand.

4 steps · 90-120 minutes

MCP & Tooling

Testing MCP Tools

Bring TDD discipline to MCP servers: unit-test handlers, protocol-test the surface, and contract-test against a real host.

4 steps · 60-90 minutes