go + vscode + cline +qwen 快速构建 MCP Server

go 编译自定义 mcp tool

current time tool 代码

bash 复制代码

package main

import (
	"context"
	"fmt"
	"time"

	"github.com/mark3labs/mcp-go/mcp"
	"github.com/mark3labs/mcp-go/server"
)

func main() {
	// Create MCP server
	s := server.NewMCPServer(
		"Demo ?",
		"1.0.0",
	)
	// Add tool
	tool := mcp.NewTool("current time",
		mcp.WithDescription("Get current time with timezone, Asia/Shanghai is default"),
		mcp.WithString("timezone",
			mcp.Required(),
			mcp.Description("current time timezone"),
		),
	)
	// Add tool handler
	s.AddTool(tool, currentTimeHandler)
	// Start the stdio server
	if err := server.ServeStdio(s); err != nil {
		fmt.Printf("Server error: %v\n", err)
	}
}

func currentTimeHandler(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	timezone, ok := request.Params.Arguments["timezone"].(string)
	if !ok {
		return mcp.NewToolResultError("timezone must be a string"), nil
	}

	loc, err := time.LoadLocation(timezone)
	if err != nil {
		return mcp.NewToolResultError(fmt.Sprintf("parse timezone with error: %v", err)), nil
	}
	return mcp.NewToolResultText(fmt.Sprintf(`current time is %s`, time.Now().In(loc))), nil
}

编译

bash 复制代码

go build -o current-time-tool.exe .\current_time.go

阿里云百炼平台获取大模型 api key

https://bailian.console.aliyun.com/#/home

vscode插件市场安装cline

安装

搜索cline安装即可
配置千问大模型

API Provider 选择 OPENAI Compatiable

Base URL 设置为 https://dashscope.aliyuncs.com/compatible-mode/v1

API Key 设置为从阿里云百炼平台获取的大模型 api key

Model ID 设置为 qwen-max-latest
MCP Servers配置 current time tool

MCP Servers -> Installed -> Configure MCP Servers , 配置成如下内容

bash 复制代码

{
    "mcpServers": {
        "current-time-tool": {
            "command": "E:\\GolangProjects\\src\\mcp-learning\\current_time\\current-time-tool.exe",
            "args": [],
            "env": {}
        }
    }
}

Auto-approve 选择 Use MCP Servers

cline 点击 + 新建对话

输入 "上海时间现在是多少"
输出之后，点击 Approve, 可以发现已经使用了 current-time-tool