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1. 使用python完成mcp服务

1.1 准备环境（python安装fastmcp）

fastmcp官方文档：https://modelcontextprotocol.io/introduction

uv add fastmcp

1.2 mcp服务端示例代码

#!/usr/bin/env python 
# coding: utf-8
from mcp.server.fastmcp import FastMCP# name: 是服务器的标识符或名称，用于区分不同的 MCP 服务器
# instructions:服务器描述，用于日志、文档和客户端展示
mcp = FastMCP("mcp_server_demo", "mcp server example", port=8095)@mcp.tool("sum of two numbers", "计算两数之和")
def add(a: int, b: int) -> int:"""sum of two numbersmcp.tool注册工具函数add，工具是模型可以调用的功能，由服务器暴露给客户端或语言模型:param a::param b::return:"""print(f"计算两数之和a:{a}, b:{b}")return a + bif __name__ == '__main__':# mcp: Model Context Protocol,模型上下文协议# 启动mcp服务器， transport=stdio(指定通信方式为标准输入输出），sse（Server-Sent Events。单向通信，基于HTTP协议的服务器推送技术）mcp.run(transport="sse")

1.3 启动mcp服务端

# Using the FastMCP CLI
fastmcp run server.py# Or with Python/uv directly
python server.py
uv run python server.py# need node.js to launches a web interface
fastmcp dev server.py

sse方式示例：

(test-uv) (base) pywcc@wcc:~/test_uv$ uv run mcp_demo.py
INFO:     Started server process [15248]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://0.0.0.0:8095 (Press CTRL+C to quit)

2. dify接入

2.1 安装MCP SSE和Agent 策略（支持 MCP 工具）插件

https://marketplace.dify.ai/plugins/junjiem/mcp_see_agent?language=zh-Hans

https://marketplace.dify.ai/plugins/junjiem/mcp_sse?language=zh-Hans

应用市场：https://marketplace.dify.ai/

下载插件：

离线安装插件：

2.2 dify agent插件配置mcp:

2.3 mcp服务配置：

# 示例
{"server_name1": {"url": "http://host.docker.internal:8095/sse","headers": {},"timeout": 60,"sse_read_timeout": 300},"server_name2": {"url": "http://host.docker.internal:8095/sse"}
}# 单个mcp server
{"mcp_server_demo":{"url":"http://host.docker.internal:8095/sse","headers": {},"timeout": 60,"sse_read_timeout": 300}}

2.4 添加授权

指令：

你是一个工具助手，支持mcp协议获取可用工具，并执行工具调用。

2.5 点击运行

mcp服务端日志：

[05/10/25 18:58:21] INFO     Processing request of type            server.py:534ListToolsRequest                                   
[05/10/25 19:02:26] INFO     Processing request of type            server.py:534ListToolsRequest                                   INFO     Processing request of type            server.py:534CallToolRequest                                    
INFO:     127.0.0.1:33780 - "GET /sse HTTP/1.1" 200 OK
INFO:     127.0.0.1:33788 - "POST /messages/?session_id=dc23ee63234e4e38a85415f65796e608 HTTP/1.1" 202 Accepted
INFO:     127.0.0.1:33788 - "POST /messages/?session_id=dc23ee63234e4e38a85415f65796e608 HTTP/1.1" 202 Accepted
INFO:     127.0.0.1:33788 - "POST /messages/?session_id=dc23ee63234e4e38a85415f65796e608 HTTP/1.1" 202 Accepted
INFO:     127.0.0.1:33788 - "POST /messages/?session_id=dc23ee63234e4e38a85415f65796e608 HTTP/1.1" 202 Accepted
计算两数之和a:1, b:2

运行结果：