index.js•2.71 kB
#!/usr/bin/env node
/**
* Generic MCP Server Template
* A reusable template for creating Model Context Protocol servers
*/
import { Server } from '@modelcontextprotocol/sdk/server/index.js';
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import {
CallToolRequestSchema,
ListToolsRequestSchema,
ErrorCode,
McpError
} from '@modelcontextprotocol/sdk/types.js';
import fs from 'fs-extra';
import path from 'path';
import { fileURLToPath } from 'url';
import { dirname } from 'path';
import configLoader from '../config/config-loader.js';
import { toolRegistry } from '../tools/tool-registry.js';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
// Load configuration
const CONFIG = configLoader.loadConfig();
// Logging utility
const log = (message, level = 'info') => {
if (CONFIG.debug || level === 'error') {
console.error(`[${new Date().toISOString()}] ${level.toUpperCase()}: ${message}`);
}
};
// Create MCP server
const server = new Server(
{
name: CONFIG.serverName || 'mcp-template-server',
version: CONFIG.version || '1.0.0'
},
{
capabilities: {
tools: {}
}
}
);
// Handle list tools request
server.setRequestHandler(ListToolsRequestSchema, async () => {
const tools = toolRegistry.getTools();
log(`Returning ${tools.length} available tools`);
return { tools };
});
// Handle tool execution
server.setRequestHandler(CallToolRequestSchema, async (request) => {
const { name, arguments: args } = request.params;
log(`Executing tool: ${name}`);
try {
const result = await toolRegistry.executeTool(name, args);
return {
content: [
{
type: 'text',
text: typeof result === 'string' ? result : JSON.stringify(result, null, 2)
}
]
};
} catch (error) {
log(`Error executing tool ${name}: ${error.message}`, 'error');
if (error instanceof McpError) {
throw error;
}
throw new McpError(
ErrorCode.InternalError,
`Tool execution failed: ${error.message}`
);
}
});
// Start server
async function main() {
log('Starting MCP server...');
// Initialize tool registry
await toolRegistry.initialize(CONFIG);
// Use stdio transport
const transport = new StdioServerTransport();
await server.connect(transport);
log(`Server started: ${CONFIG.serverName} v${CONFIG.version}`);
// Handle shutdown
process.on('SIGINT', async () => {
log('Shutting down server...');
await server.close();
process.exit(0);
});
}
// Run server
main().catch((error) => {
console.error('Fatal error:', error);
process.exit(1);
});