langchain-mcp-adapters

Why we included this project

Many teams building on LangChain or LangGraph keep their tools behind Model Context Protocol servers, and this library bridges the two without much ceremony. It converts MCP tools into native LangChain tools, so a single load_mcp_tools call pulls whatever an external server exposes into the agent runtime. MultiServerMCPClient goes a step further and registers several servers at once, letting one agent call into a math service, a weather endpoint, or anything else without a bespoke adapter per source. That's a real convenience when you already run a fleet of MCP servers and want them usable inside a LangGraph workflow. A JavaScript/TypeScript port covers teams on the JS side of the stack.