🦜 🔗 LangChain MCP Client

This simple Model Context Protocol (MCP) client demonstrates the use of MCP server tools by LangChain ReAct Agent.

• 🌐 Seamlessly connect to any MCP servers.
• 🤖 Use any LangChain-compatible LLM for flexible model selection.
• 💬 Interact via CLI, enabling dynamic conversations.

Conversion to LangChain Tools

It leverages a utility function convert_mcp_to_langchain_tools() from langchain_mcp_tools.
This function handles parallel initialization of specified multiple MCP servers and converts their available tools into a list of LangChain-compatible tools (List[BaseTool]).

Installation

The python version should be 3.11 or higher.

pip install langchain_mcp_client

Configuration

Create a .env file containing all the necessary API_KEYS to access your LLM.

Configure the LLM, MCP servers, and prompt example in the llm_mcp_config.json5 file:

1. LLM Configuration: Set up your LLM parameters.
2. MCP Servers: Specify the MCP servers to connect to.
3. Example Queries: Define example queries that invoke MCP server tools. Press Enter to use these example queries when prompted.

Usage

langchain-mcp-client

Below an example with jupyter-mcp-server:

Credits

This initial code of this repo is taken from from hideya/mcp-client-langchain-py (MIT License).