lc2mcp

概述

lc2mcp 是一个简单而强大的工具适配器，架起了 LangChain 丰富的工具生态系统与模型上下文协议 (MCP) 之间的桥梁。它使开发人员能够将现有的 LangChain 工具暴露给 MCP 客户端（如 Claude 和 Cursor），而无需重写这些工具。该库自动将 LangChain 工具转换为 MCP 兼容格式，处理 Pydantic 到 JSON schema 的转换、参数描述、工具命名空间和上下文注入。

试试问 AI

装完之后，这里有 4 个你可以让 AI 做的事：

• get_weatherget_weather(city: str, unit: str = "celsius") -> str

  Get current weather for a city.

  试试:What's the weather like in London?试试:Get weather for Paris in celsius
• whoamiwhoami(runtime: ToolRuntime[UserContext]) -> str

  Return the current user.

  试试:Who am I?试试:Show user information
• process_dataprocess_data(data: str, mcp_ctx: Context) -> str

  Process data with progress reporting.

  试试:Process this dataset试试:Start data processing with progress updates
• DuckDuckGoSearchRun

  Perform a search using DuckDuckGo.

  试试:Search for latest AI news试试:Find information about quantum computing
• WikipediaQueryRun

  Query Wikipedia for information.

  试试:Look up information about the solar system试试:Find details about the history of Rome

可对比工具

安装

pip install lc2mcp

{
  "mcpServers": {
    "lc2mcp-example": {
      "command": "python",
      "args": ["-m", "fastmcp", "run", "/path/to/your/script.py"]
    }
  }
}

lc2mcp 对比