MCP4Go

MCP4Go is a Go implementation of the Model Context Protocol (MCP), designed to simplify the development of AI applications by abstracting away protocol complexities.

Features

• Complete MCP protocol implementation in pure Go
• High-level abstractions for common MCP resources
• Pluggable architecture for custom extensions
• Comprehensive documentation and examples
• Production-ready with robust error handling

Installation

MCP4Go requires Go 1.18 or later. Install it using Go modules:

go get github.com/mcp4go/mcp4go

Getting Started

To get started with MCP4Go, import the package in your Go application:

package main

import (
	"context"
	"fmt"
	"log"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/mcp4go/mcp4go/pkg/logger"
	"github.com/mcp4go/mcp4go/protocol"
	"github.com/mcp4go/mcp4go/server"
	"github.com/mcp4go/mcp4go/server/iface"
	"github.com/mcp4go/mcp4go/server/transport"

	_ "time/tzdata" // Load all time zones
)

func main() {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	_logger := logger.DefaultLog

	// Listen for interrupt signals for graceful exit
	signalCh := make(chan os.Signal, 1)
	signal.Notify(signalCh, os.Interrupt, syscall.SIGTERM)
	go func() {
		<-signalCh
		_logger.Logf(ctx, logger.LevelWarn, "Received shutdown signal")
		cancel()
	}()

	type timeRequest struct {
		TimeZone string `json:"time_zone,omitempty" description:"time zone default is Asia/Shanghai"`
	}

	// Create standard input/output transport layer
	stdioTransport := transport.NewStdioTransport()
	// Create MCP server and configure options