// {{ project_name }} - Minimal Go MCP server (stdio)
// SPDX-License-Identifier: {{ license }}
package main
import (
"encoding/json"
"log"
"os"
"time"
"github.com/mark3labs/mcp-go/mcp"
"github.com/mark3labs/mcp-go/server"
)
const (
appName = "{{ bin_name }}"
appVersion = "{{ version }}"
)
// handleGetSystemTime returns current time in RFC3339 with optional timezone
func handleGetSystemTime(_ mcp.CallToolRequest) (mcp.ToolResult, error) {
now := time.Now().UTC().Format(time.RFC3339)
payload := map[string]string{"time": now, "timezone": "UTC"}
b, _ := json.Marshal(payload)
return mcp.StringResult(string(b)), nil
}
func main() {
logger := log.New(os.Stderr, "", log.LstdFlags)
logger.Printf("starting %s %s (stdio)", appName, appVersion)
// Create server and register a single tool
s := server.NewMCPServer(
appName,
appVersion,
server.WithToolCapabilities(false),
server.WithLogging(),
server.WithRecovery(),
)
// Simple time tool
getTime := mcp.NewTool("get_system_time",
mcp.WithDescription("Get current time in UTC (RFC3339)"),
mcp.WithTitleAnnotation("Get System Time"),
mcp.WithReadOnlyHintAnnotation(true),
)
s.AddTool(getTime, handleGetSystemTime)
// Serve over stdio (MCP)
if err := server.ServeStdio(s); err != nil {
logger.Fatalf("stdio server error: %v", err)
}
}
