{"id":53161,"date":"2025-08-12T01:39:42","date_gmt":"2025-08-11T17:39:42","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/53161.html"},"modified":"2025-08-12T01:39:42","modified_gmt":"2025-08-11T17:39:42","slug":"langgraph-%e6%8e%a5%e5%85%a5mcp","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/53161.html","title":{"rendered":"LangGraph \u63a5\u5165MCP"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>1.MCP<\/li>\n<li>2.\u5de5\u4f5c\u673a\u5236<\/li>\n<li>3.MCP\u7684\u4e24\u79cd\u5b9e\u73b0\u65b9\u5f0f<\/li>\n<li>4.Agent\u63a5\u5165MCP\u670d\u52a1<\/li>\n<li>5.\u624b\u5199MCP\u670d\u52a1<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>1.MCP<\/h3>\n<p>MCP\u5373Model Context Protocol&#xff08;\u6a21\u578b\u4e0a\u4e0b\u6587\u534f\u8bae&#xff09;&#xff0c;\u4e8e 2024 \u5e74 11 \u6708\u7531 Claude \u5927\u6a21\u578b\u7684\u516c\u53f8 Anthropic \u63a8\u51fa\u5e76\u5f00\u6e90&#xff0c;\u63d0\u4f9b\u7edf\u4e00\u7684\u901a\u4fe1\u63a5\u53e3&#xff0c;\u65e8\u5728\u89e3\u51b3\u5927\u6a21\u578b\u4e0e\u5916\u90e8\u6570\u636e\u6e90\u3001\u5de5\u5177\u53ca\u7cfb\u7edf\u96c6\u6210\u65f6\u7684\u788e\u7247\u5316\u95ee\u9898&#xff0c;MCP \u53ef\u4ee5\u7406\u89e3\u4e3aAI \u4e16\u754c\u7684 USB-C \u63a5\u53e3&#xff0c;\u5b83\u7684\u6838\u5fc3\u76ee\u6807\u662f\u8ba9 AI \u6a21\u578b&#xff08;\u5982 ChatGPT\u3001Claude \u7b49&#xff09;\u80fd\u591f\u50cf\u901a\u7528\u9065\u63a7\u5668\u4e00\u6837&#xff0c;\u901a\u8fc7\u7edf\u4e00\u534f\u8bae\u8fde\u63a5\u5404\u7c7b\u6570\u636e\u6e90\u548c\u5de5\u5177&#xff0c;\u5b9e\u73b0\u9ad8\u6548\u3001\u5b89\u5168\u7684\u8de8\u7cfb\u7edf\u534f\u4f5c\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173936-689a2ad8b82ae.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> MCP\u53ef\u4ee5\u89e3\u51b3Function calling\u7684\u5f0a\u7aef&#xff0c;Function calling\u5728\u4f7f\u7528\u65f6\u9700\u8981\u6784\u5efa\u4e00\u4e2a\u5916\u90e8\u51fd\u6570\u4f5c\u4e3a\u4e2d\u4ecb&#xff0c;\u4e00\u8fb9\u63a5\u6536\u5927\u6a21\u578b\u53d1\u51fa\u7684\u8bf7\u6c42&#xff0c;\u53e6\u4e00\u8fb9\u8d1f\u8d23\u8c03\u7528\u5916\u90e8\u5de5\u5177&#xff0c;\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5927\u6a21\u578b\u80fd\u591f\u95f4\u63a5\u5b9e\u73b0\u5bf9\u5916\u90e8\u5de5\u5177\u7684\u8c03\u7528\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173937-689a2ad9709c3.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u6bd4\u5982\u5f53\u67e5\u8be2\u5929\u6c14\u65f6&#xff0c;\u5927\u6a21\u578b\u8c03\u7528\u5916\u90e8\u5de5\u5177\u7684function calling\u8fc7\u7a0b\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173937-689a2ad9a7b6b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u6b64\u65f6\u9700\u8981\u7f16\u5199\u5916\u90e8\u51fd\u6570&#xff0c;\u5916\u90e8\u51fd\u6570\u5f80\u5f80\u9700\u8981\u4e0a\u767e\u884c\u4ee3\u7801&#xff0c;\u800c\u4e14\u8fd8\u9700\u8981\u8bbe\u8ba1\u63d0\u793a\u8bcd\u6a21\u7248&#xff0c;\u624d\u80fd\u63d0\u9ad8Function calling\u54cd\u5e94\u7684\u51c6\u786e\u7387\u3002<\/p>\n<p>\u800cMCP\u80fd\u5728Agent\u5f00\u53d1\u8fc7\u7a0b\u4e2d&#xff0c;\u8ba9\u5927\u6a21\u578b\u66f4\u52a0\u4fbf\u6377\u7684\u8c03\u7528\u5916\u90e8\u5de5\u5177\u3002MCP\u9996\u5148\u7edf\u4e00\u4e86Function calling\u7684\u8fd0\u884c\u89c4\u8303\u3002MCP\u628a\u5927\u6a21\u578b\u8fd0\u884c\u73af\u5883\u79f0\u4f5c MCP Client&#xff0c;\u4e5f\u5c31\u662fMCP\u5ba2\u6237\u7aef&#xff0c;\u540c\u65f6&#xff0c;\u628a\u5916\u90e8\u51fd\u6570\u8fd0\u884c\u73af\u5883\u79f0\u4f5cMCP Server&#xff0c;\u4e5f\u5c31\u662fMCP\u670d\u52a1\u5668&#xff0c;\u7136\u540e\u7edf\u4e00\u4e86MCP\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7684\u8fd0\u884c\u89c4\u8303&#xff0c;\u5e76\u4e14\u8981\u6c42MCP\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4&#xff0c;\u4e5f\u7edf\u4e00\u6309\u7167\u67d0\u4e2a\u65e2\u5b9a\u7684\u63d0\u793a\u8bcd\u6a21\u677f\u8fdb\u884c\u901a\u4fe1\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173937-689a2ad9d67d9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>2.\u5de5\u4f5c\u673a\u5236<\/h3>\n<p>\u4ee5\u4e0b\u6848\u4f8b\u7ed9\u2f24\u6a21\u578b\u63d0\u4f9b\u8def\u7ebf\u89c4\u5212\u7684\u80fd\u2f12\u3002 \u4ee5\u2fbc\u5fb7\u5730\u56fe\u63d0\u4f9b\u7684MCP\u670d\u52a1\u4e3a\u4f8b&#xff0c;\u2fbc\u5fb7\u5730\u56fe\u5f00\u653e\u5e73\u53f0\u63d0\u4f9b\u4e86MCP\u63a5\u2f0a\u4ecb\u7ecd&#xff1a; https:\/\/lbs.amap.com\/api\/mcp-server\/summary\u3002 \u53ea\u9700\u8981\u5728\u2fbc\u5fb7\u5f00\u653e\u5e73\u53f0\u6ce8\u518c\u8d26\u53f7&#xff0c;\u767b\u5f55\u540e&#xff0c;\u5728\u5de6\u4fa7\u83dc\u5355\u4e2d\u9009\u62e9\u201c\u5e94\u2f64\u7ba1\u7406\u201d-&gt;\u201c\u6211\u7684\u5e94\u2f64\u201d&#xff0c;\u7136\u540e\u521b\u5efa\u65b0\u5e94\u2f64&#xff0c;\u5c31\u53ef\u4ee5\u7533\u8bf7api_key <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173938-689a2ada5930a.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><span class=\"token keyword\">from<\/span> langchain_openai <span class=\"token keyword\">import<\/span> ChatOpenAI<br \/>\n<span class=\"token keyword\">import<\/span> datetime<br \/>\n<span class=\"token keyword\">from<\/span> langchain<span class=\"token punctuation\">.<\/span>tools <span class=\"token keyword\">import<\/span> tool<\/p>\n<p>llm <span class=\"token operator\">&#061;<\/span> ChatOpenAI<span class=\"token punctuation\">(<\/span><br \/>\n    model<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;qwen-plus&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    base_url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/dashscope.aliyuncs.com\/compatible-mode\/v1&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    openai_api_key<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;API_KEY&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    streaming<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u5b9a\u4e49\u5de5\u5177<\/span><br \/>\n<span class=\"token decorator annotation punctuation\">&#064;tool<\/span><span class=\"token punctuation\">(<\/span>description<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u89c4\u5212\u884c\u8f66\u8def\u7ebf&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">get_route_plan<\/span><span class=\"token punctuation\">(<\/span>origin_city<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><span class=\"token punctuation\">,<\/span> target_city<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u89c4\u5212\u884c\u8f66\u8def\u7ebf<br \/>\n    Args:<br \/>\n        origin_city: \u51fa\u53d1\u57ce\u5e02<br \/>\n        target_city: \u76ee\u6807\u57ce\u5e02<br \/>\n    &#034;&#034;&#034;<\/span><br \/>\n    result <span class=\"token operator\">&#061;<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u4ece\u57ce\u5e02 <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>origin_city<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\"> \u51fa\u53d1&#xff0c;\u5230\u76ee\u6807\u57ce\u5e02 <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>target_city<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\"> ,\u53ea\u9700\u610f\u5ff5&#xff0c;\u4e09\u5206\u949f\u5373\u53ef\u5230\u8fbe\u3002&#034;<\/span><\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&gt;&gt;&gt;&gt; get_route_plan &gt;&gt;&gt;&gt;&gt;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> result<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> result<\/p>\n<p><span class=\"token comment\"># \u5927\u6a21\u578b\u7ed1\u5b9a\u5de5\u5177<\/span><br \/>\nllm_with_tools <span class=\"token operator\">&#061;<\/span> llm<span class=\"token punctuation\">.<\/span>bind_tools<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span>get_route_plan<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u5de5\u5177\u5bb9\u5668<\/span><br \/>\nall_tools <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;get_route_plan&#034;<\/span><span class=\"token punctuation\">:<\/span> get_route_plan<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\"># \u51c6\u5907\u67e5\u8be2\u548c\u6d88\u606f\u5217\u8868<\/span><br \/>\nquery <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u5e2e\u6211\u89c4\u5212\u4e00\u6761\u4ece\u5e7f\u5dde\u5230\u65b0\u7586\u7684\u81ea\u9a7e\u8def\u7ebf&#034;<\/span><br \/>\nmessages <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>query<span class=\"token punctuation\">]<\/span><\/p>\n<p><span class=\"token comment\"># \u83b7\u53d6\u5de5\u5177\u8c03\u7528\u8bf7\u6c42<\/span><br \/>\nai_msg <span class=\"token operator\">&#061;<\/span> llm_with_tools<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span>messages<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>ai_msg<span class=\"token punctuation\">)<\/span><br \/>\nmessages<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>ai_msg<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u6253\u5370\u5e76\u5904\u7406\u5de5\u5177\u8c03\u7528<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>ai_msg<span class=\"token punctuation\">.<\/span>tool_calls<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">if<\/span> ai_msg<span class=\"token punctuation\">.<\/span>tool_calls<span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> tool_call <span class=\"token keyword\">in<\/span> ai_msg<span class=\"token punctuation\">.<\/span>tool_calls<span class=\"token punctuation\">:<\/span><br \/>\n        selected_tool <span class=\"token operator\">&#061;<\/span> all_tools<span class=\"token punctuation\">[<\/span>tool_call<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>lower<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">]<\/span><br \/>\n        tool_msg <span class=\"token operator\">&#061;<\/span> selected_tool<span class=\"token punctuation\">.<\/span>invoke<span class=\"token punctuation\">(<\/span>tool_call<span class=\"token punctuation\">)<\/span><br \/>\n        messages<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>tool_msg<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u83b7\u53d6\u6700\u7ec8\u54cd\u5e94<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\n\u6d41\u5f0f\u8f93\u51fa\u7ed3\u679c&#xff1a;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">for<\/span> chunk <span class=\"token keyword\">in<\/span> llm_with_tools<span class=\"token punctuation\">.<\/span>stream<span class=\"token punctuation\">(<\/span>messages<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> chunk<span class=\"token punctuation\">.<\/span>content<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>chunk<span class=\"token punctuation\">.<\/span>content<span class=\"token punctuation\">,<\/span> end<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">,<\/span> flush<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span>  <\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173938-689a2ada9a6d9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u4ece\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\u9ad8\u5fb7\u63d0\u4f9b\u7684 MCP \u670d\u52a1\u6570\u636e\u53ef\u4fe1\u5ea6\u66f4\u9ad8&#xff0c;\u6240\u4ee5\u88ab\u5927\u6a21\u578b\u76f4\u63a5\u91c7\u7528\u5b83\u7684\u6570\u636e&#xff0c;\u81ea\u5df1\u63d0\u4f9b\u7684\u610f\u5ff5\u4f20\u9001\u76f8\u5173\u6570\u636e\u7f3a\u4e4f\u53ef\u9760\u6027&#xff0c;\u5927\u6a21\u578b\u53c2\u8003\u4e86&#xff0c;\u4f46\u662f\u6700\u7ec8\u6ca1\u6709\u91c7\u7eb3\u3002\u53ef\u4ee5\u77e5\u9053\u5de5\u5177\u5728\u5904\u7406\u5177\u4f53\u95ee\u9898\u65f6\u5b58\u5728\u7684\u7f3a\u9677&#xff0c;\u662f\u5426\u8c03\u7528\u5de5\u5177\u5b8c\u5168\u7531\u5927\u6a21\u578b\u81ea\u4e3b\u51b3\u5b9a&#xff0c;\u65e0\u8bba\u5de5\u5177\u8fd4\u56de\u4ec0\u4e48&#xff0c;\u6700\u7ec8\u5927\u6a21\u578b\u8f93\u51fa\u7684\u5185\u5bb9\u8fd8\u662f\u81ea\u5df1\u8bf4\u4e86\u7b97&#xff0c;\u81f3\u4e8e\u5de5\u5177\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u7684\u5177\u4f53\u64cd\u4f5c&#xff0c;\u5927\u6a21\u578b\u5219\u4e0d\u5e72\u9884\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173939-689a2adb80a13.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>3.MCP\u7684\u4e24\u79cd\u5b9e\u73b0\u65b9\u5f0f<\/h3>\n<p>\u5206\u522b\u662f\u57fa\u4e8e\u6807\u51c6\u8f93\u5165\u8f93\u51fa&#xff08;stdio&#xff09;\u7684\u672c\u5730\u8fdb\u7a0b\u901a\u4fe1\u548c\u57fa\u4e8e HTTP\/SSE \u7684\u7f51\u7edc\u901a\u4fe1&#xff0c;\u4ee5\u9ad8\u5fb7\u5730\u56fe\u7684 MCP \u670d\u52a1\u4e3a\u4f8b&#xff0c;\u5176\u5f00\u653e\u5e73\u53f0\u7684\u8bf4\u660e\u4e2d\u7ed9\u51fa\u4e86\u4e24\u79cd\u63a5\u5165\u8be5\u670d\u52a1\u7684\u914d\u7f6e\u65b9\u5f0f\u3002 sse\u65b9\u5f0f<\/p>\n<p><span class=\"token punctuation\">{<\/span><br \/>\n <span class=\"token string\">&#034;mcpServers&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n   <span class=\"token string\">&#034;amap-amap-sse&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n     <span class=\"token string\">&#034;url&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;https:\/\/mcp.amap.com\/sse?key&#061;key&#034;<\/span><br \/>\n   <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>stdio\u65b9\u5f0f<\/p>\n<p><span class=\"token string\">&#034;amap-maps&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token string\">&#034;command&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;npx&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n      <span class=\"token string\">&#034;args&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n          <span class=\"token string\">&#034;-y&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n          <span class=\"token string\">&#034;&#064;amap\/amap-maps-mcp-server&#034;<\/span><br \/>\n      <span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n      <span class=\"token string\">&#034;env&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n          <span class=\"token string\">&#034;AMAP_MAPS_API_KEY&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;key&#034;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4e24\u79cd\u65b9\u5f0f\u533a\u522b <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173939-689a2adbcf725.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u5b9e\u9645\u4f7f\u7528\u65f6&#xff0c;\u672c\u5730\u5f00\u53d1\u5e38\u7528stdio\u65b9\u5f0f&#xff0c;\u751f\u4ea7\u73af\u5883\u7684\u5206\u5e03\u5f0f\u573a\u666f\u5219\u66f4\u591a\u4f7f\u7528HTTP\/SSE\u65b9\u5f0f\u3002<\/p>\n<h3>4.Agent\u63a5\u5165MCP\u670d\u52a1<\/h3>\n<p>\u9996\u5148\u5b89\u88c5\u4f9d\u8d56<\/p>\n<p>pip <span class=\"token function\">install<\/span> langchain-mcp-adapters<\/p>\n<p><span class=\"token keyword\">from<\/span> langchain_mcp_adapters<span class=\"token punctuation\">.<\/span>client <span class=\"token keyword\">import<\/span> MultiServerMCPClient<br \/>\n<span class=\"token keyword\">from<\/span> langgraph<span class=\"token punctuation\">.<\/span>prebuilt <span class=\"token keyword\">import<\/span> create_react_agent<br \/>\n<span class=\"token keyword\">from<\/span> langchain_community<span class=\"token punctuation\">.<\/span>chat_models <span class=\"token keyword\">import<\/span> ChatTongyi<br \/>\n<span class=\"token keyword\">import<\/span> asyncio<\/p>\n<p>llm <span class=\"token operator\">&#061;<\/span> ChatTongyi<span class=\"token punctuation\">(<\/span><br \/>\n    model<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;qwen-plus&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    api_key<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;API_KEY&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u914d\u7f6e\u9ad8\u5fb7\u5730\u56feMCP\u5ba2\u6237\u7aef&#xff0c;\u4f7f\u7528SSE\u65b9\u5f0f\u8fde\u63a5<\/span><br \/>\n    client <span class=\"token operator\">&#061;<\/span> MultiServerMCPClient<span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#034;amap-maps-sse&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token string\">&#034;url&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;https:\/\/mcp.amap.com\/sse?key&#061;xxxxxxxx&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token string\">&#034;transport&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;sse&#034;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n             <span class=\"token comment\">#  &#034;amap-maps&#034;: {<\/span><br \/>\n               <span class=\"token comment\">#     &#034;command&#034;: &#034;npx&#034;,<\/span><br \/>\n               <span class=\"token comment\">#     &#034;args&#034;: [<\/span><br \/>\n               <span class=\"token comment\">#         &#034;-y&#034;,<\/span><br \/>\n               <span class=\"token comment\">#         &#034;&#064;amap\/amap-maps-mcp-server&#034;<\/span><br \/>\n               <span class=\"token comment\">#     ],<\/span><br \/>\n               <span class=\"token comment\">#     &#034;env&#034;: {<\/span><br \/>\n               <span class=\"token comment\">#         &#034;AMAP_MAPS_API_KEY&#034;: &#034;xxxxxxxx&#034;<\/span><br \/>\n               <span class=\"token comment\">#     },<\/span><br \/>\n               <span class=\"token comment\">#     &#034;transport&#034;:&#034;stdio&#034;<\/span><br \/>\n               <span class=\"token comment\"># }<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        tools <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> client<span class=\"token punctuation\">.<\/span>get_tools<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        agent <span class=\"token operator\">&#061;<\/span> create_react_agent<span class=\"token punctuation\">(<\/span><br \/>\n            model<span class=\"token operator\">&#061;<\/span>llm<span class=\"token punctuation\">,<\/span><br \/>\n            tools<span class=\"token operator\">&#061;<\/span>tools<br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n        response <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> agent<span class=\"token punctuation\">.<\/span>ainvoke<span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;messages&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;role&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;user&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;content&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u5e2e\u6211\u89c4\u5212\u4e00\u6761\u4ece\u5e7f\u5dde\u5230\u65b0\u7586\u7684\u81ea\u9a7e\u8def\u7ebf&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> response<br \/>\n    <span class=\"token keyword\">except<\/span> Exception <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u53d1\u751f\u9519\u8bef: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>e<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">None<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#034;__main__&#034;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    result <span class=\"token operator\">&#061;<\/span> asyncio<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>main<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> result<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173940-689a2adc0600d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>5.\u624b\u5199MCP\u670d\u52a1<\/h3>\n<p>MCP\u670d\u52a1<\/p>\n<p><span class=\"token keyword\">from<\/span> mcp<span class=\"token punctuation\">.<\/span>server<span class=\"token punctuation\">.<\/span>fastmcp <span class=\"token keyword\">import<\/span> FastMCP<\/p>\n<p>mcp <span class=\"token operator\">&#061;<\/span> FastMCP<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;roymcpdemo&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;mcp<span class=\"token punctuation\">.<\/span>tool<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;Add two numbers together.&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;roy mcp demo called : add(<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>a<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>b<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">)&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;mcp<span class=\"token punctuation\">.<\/span>tool<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">weather<\/span><span class=\"token punctuation\">(<\/span>city<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u83b7\u53d6\u67d0\u4e2a\u57ce\u5e02\u7684\u5929\u6c14<br \/>\n    Args:<br \/>\n        city: \u5177\u4f53\u57ce\u5e02<br \/>\n    &#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;\u57ce\u5e02&#034;<\/span> <span class=\"token operator\">&#043;<\/span> city <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;,\u4eca\u5929\u5929\u6c14\u4e0d\u9519&#034;<\/span><\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;mcp<span class=\"token punctuation\">.<\/span>resource<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;greeting:\/\/{name}&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">greeting<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">str<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token builtin\">str<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;Greet a person by name.&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;roy mcp demo called : greeting(<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>name<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">)&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Hello, <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>name<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">!&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#034;__main__&#034;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u4ee5sse\u534f\u8bae\u66b4\u9732\u670d\u52a1\u3002<\/span><br \/>\n    mcp<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>transport<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;sse&#039;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token comment\"># \u4ee5stdio\u534f\u8bae\u66b4\u9732\u670d\u52a1\u3002<\/span><br \/>\n    <span class=\"token comment\"># mcp.run(transport&#061;&#039;stdio&#039;)<\/span><\/p>\n<p>\u8fd0\u884c\u670d\u52a1\u7aef <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811173941-689a2add229f6.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>MCP\u5ba2\u6237\u7aef<\/p>\n<p><span class=\"token keyword\">from<\/span> mcp <span class=\"token keyword\">import<\/span>  ClientSession<br \/>\n<span class=\"token keyword\">import<\/span> mcp<span class=\"token punctuation\">.<\/span>types <span class=\"token keyword\">as<\/span> types<\/p>\n<p>SERVER_URL <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;http:\/\/127.0.0.1:8000\/sse&#034;<\/span><\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">handle_sampling_message<\/span><span class=\"token punctuation\">(<\/span>message<span class=\"token punctuation\">:<\/span> types<span class=\"token punctuation\">.<\/span>CreateMessageRequestParams<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token operator\">&gt;<\/span> types<span class=\"token punctuation\">.<\/span>CreateMessageResult<span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;sampling message: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>message<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> types<span class=\"token punctuation\">.<\/span>CreateMessageResult<span class=\"token punctuation\">(<\/span><br \/>\n        role<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;assistant&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        content<span class=\"token operator\">&#061;<\/span>types<span class=\"token punctuation\">.<\/span>TextContent<span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token builtin\">type<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;text&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            text<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Hello,world! from model&#034;<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        model<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;qwen-plus&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        stopReason<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;endTurn&#034;<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">run<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">from<\/span> mcp<span class=\"token punctuation\">.<\/span>client<span class=\"token punctuation\">.<\/span>sse <span class=\"token keyword\">import<\/span> sse_client<br \/>\n    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> sse_client<span class=\"token punctuation\">(<\/span>SERVER_URL<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> <span class=\"token punctuation\">(<\/span>read<span class=\"token punctuation\">,<\/span> write<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> ClientSession<span class=\"token punctuation\">(<\/span>read<span class=\"token punctuation\">,<\/span> write<span class=\"token punctuation\">,<\/span> sampling_callback<span class=\"token operator\">&#061;<\/span>handle_sampling_message<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> session<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">await<\/span> session<span class=\"token punctuation\">.<\/span>initialize<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            prompts <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> session<span class=\"token punctuation\">.<\/span>list_prompts<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;prompts: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>prompts<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            tools <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> session<span class=\"token punctuation\">.<\/span>list_tools<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;tools: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>tools<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            resources <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> session<span class=\"token punctuation\">.<\/span>list_resources<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;resources: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>resources<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token 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