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

go code ：

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
//}

func currentTimeHandler(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
    // 先断言为 map[string]any
    args, ok := request.Params.Arguments.(map[string]any)
    if !ok {
       return mcp.NewToolResultError("invalid arguments type, must be object"), nil
    }

    // 从 map 中取 "timezone"
    timezone, ok := args["timezone"].(string)
    if !ok {
       return mcp.NewToolResultError("timezone must be a string"), nil
    }

    // 加载时区
    loc, err := time.LoadLocation(timezone)
    if err != nil {
       return mcp.NewToolResultError(fmt.Sprintf("parse timezone with error: %v", err)), nil
    }

    // 返回结果
    return mcp.NewToolResultText(fmt.Sprintf("current time is %s", time.Now().In(loc).Format("2006-01-02 15:04:05"))), nil
}

命令生成：

win：go build -o current-time-tool.exe .\current_time.go
mac：go build -o mcp_tool mcp_tool.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

 

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

{
    "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

 

 

 

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