mirror of
https://gitee.com/wanwujie/deer-flow
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1171598b2f
Add comprehensive MCP integration using langchain-mcp-adapters to enable pluggable external tools from MCP servers. Features: - MCP server configuration via mcp_config.json - Automatic lazy initialization for seamless use in both FastAPI and LangGraph Studio - Support for multiple MCP servers (filesystem, postgres, github, brave-search, etc.) - Environment variable resolution in configuration - Tool caching mechanism for optimal performance - Complete documentation and setup guide Implementation: - Add src/mcp module with client, tools, and cache components - Integrate MCP config loading in AppConfig - Update tool system to include MCP tools automatically - Add eager initialization in FastAPI lifespan handler - Add lazy initialization fallback for LangGraph Studio Dependencies: - Add langchain-mcp-adapters>=0.1.0 Documentation: - Add MCP_SETUP.md with comprehensive setup guide - Update CLAUDE.md with MCP system architecture - Update config.example.yaml with MCP configuration notes - Update README.md with MCP setup instructions Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
"""Load MCP tools using langchain-mcp-adapters."""
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import logging
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from langchain_core.tools import BaseTool
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from src.config.mcp_config import get_mcp_config
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from src.mcp.client import build_servers_config
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logger = logging.getLogger(__name__)
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async def get_mcp_tools() -> list[BaseTool]:
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"""Get all tools from enabled MCP servers.
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Returns:
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List of LangChain tools from all enabled MCP servers.
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"""
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try:
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from langchain_mcp_adapters.client import MultiServerMCPClient
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except ImportError:
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logger.warning("langchain-mcp-adapters not installed. Install it to enable MCP tools: pip install langchain-mcp-adapters")
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return []
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mcp_config = get_mcp_config()
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servers_config = build_servers_config(mcp_config)
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if not servers_config:
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logger.info("No enabled MCP servers configured")
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return []
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try:
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# Create the multi-server MCP client
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logger.info(f"Initializing MCP client with {len(servers_config)} server(s)")
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client = MultiServerMCPClient(servers_config)
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# Get all tools from all servers
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tools = await client.get_tools()
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logger.info(f"Successfully loaded {len(tools)} tool(s) from MCP servers")
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return tools
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except Exception as e:
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logger.error(f"Failed to load MCP tools: {e}", exc_info=True)
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return []
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