Overview

import { ChatOpenAI } from "@langchain/openai";
import { MCPClient } from "@mcp-use/client";
import { LangChainMCPAgent } from "@mcp-use/agent/langchain";

async function main() {
  const client = new MCPClient({
    mcpServers: {
      filesystem: {
        command: "npx",
        args: ["-y", "@modelcontextprotocol/server-filesystem", "./"],
      },
    },
  });

  const agent = new LangChainMCPAgent({
    llm: new ChatOpenAI({ model: "gpt-4o", temperature: 0 }),
    client,
  });

  try {
    await agent.initialize();
    const result = await agent.run({
      prompt: "Read package.json and summarize the project scripts.",
    });
    console.log(result);
  } finally {
    await agent.close();
  }
}

main().catch(console.error);