#!/usr/bin/env node
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import { createServer } from './server.js';
import { ServerPool, createConnection } from './pool/index.js';
import { ToolCache } from './tools/tool-cache.js';
import { getServerConfig } from './registry/index.js';
export const APP_NAME = 'meta-mcp-server';
export const VERSION = '0.1.2';
// Handle --version and --help flags
const args = process.argv.slice(2);
if (args.includes('--version') || args.includes('-v')) {
console.log(VERSION);
process.exit(0);
}
if (args.includes('--help') || args.includes('-h')) {
console.log(`${APP_NAME} v${VERSION}
A meta MCP server that wraps multiple backend MCP servers,
exposing only 3 meta-tools to reduce context token consumption.
Usage:
meta-mcp-server Start the server (stdio transport)
meta-mcp-server --version Show version
meta-mcp-server --help Show this help
Environment:
SERVERS_CONFIG Path to servers.json config file
Default: ~/.meta-mcp/servers.json
`);
process.exit(0);
}
async function main() {
// Load config on startup
const configPath = process.env.SERVERS_CONFIG;
if (configPath) {
process.stderr.write(`Loading config from: ${configPath}\n`);
}
// Create connection factory
const connectionFactory = async (serverId: string) => {
const config = getServerConfig(serverId);
if (!config) {
throw new Error(`Server config not found: ${serverId}`);
}
return createConnection(config);
};
// Initialize pool and cache
const pool = new ServerPool(connectionFactory);
const toolCache = new ToolCache();
// Create server
const { server, shutdown } = createServer(pool, toolCache);
// Graceful shutdown handlers
const handleShutdown = async () => {
process.stderr.write('Shutting down...\n');
await shutdown();
await server.close();
process.exit(0);
};
process.on('SIGINT', handleShutdown);
process.on('SIGTERM', handleShutdown);
// Connect via stdio
const transport = new StdioServerTransport();
await server.connect(transport);
process.stderr.write('Meta MCP Server running on stdio\n');
}
main().catch((error) => {
console.error('Fatal error:', error);
process.exit(1);
});
