TeamCity MCP Server

/** * Simple TeamCity MCP Server Entry Point * Minimal implementation without complex DI or abstractions */ import type { Server } from '@modelcontextprotocol/sdk/server/index.js'; import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'; import * as dotenv from 'dotenv'; import { getTeamCityToken, getTeamCityUrl } from '@/config'; import { startServerLifecycle } from '@/server-runner'; import { createSimpleServer } from './server'; // Load environment variables // Silent mode to avoid polluting stdout (required for MCP stdio transport) dotenv.config({ quiet: true }); let activeServer: Server | null = null; let lifecyclePromise: Promise<void> | null = null; let shuttingDown = false; const clearServerState = () => { activeServer = null; lifecyclePromise = null; }; async function shutdown(exitCode: number): Promise<never> { if (shuttingDown) { process.exit(exitCode); } shuttingDown = true; process.stderr.write('\nShutting down TeamCity MCP Server...\n'); try { const serverToClose = activeServer; const lifecycleToAwait = lifecyclePromise; await serverToClose?.close(); await lifecycleToAwait; } catch (error) { process.stderr.write( `Error while closing server: ${error instanceof Error ? error.message : String(error)}\n` ); } finally { clearServerState(); process.exit(exitCode); } } async function main() { try { // Validate required environment variables via centralized config let hasUrl: string; try { hasUrl = getTeamCityUrl(); getTeamCityToken(); } catch (e) { process.stderr.write(`${(e as Error).message}\n`); process.stderr.write( 'Please set TEAMCITY_URL and TEAMCITY_TOKEN in your environment or .env file.\n' ); process.exit(1); } process.stderr.write('Starting TeamCity MCP Server\n'); process.stderr.write(`TeamCity URL: ${hasUrl}\n`); // Create and start server const server = createSimpleServer(); const transport = new StdioServerTransport(); const lifecycle = startServerLifecycle(server, transport); activeServer = server; lifecyclePromise = lifecycle; process.stderr.write('TeamCity MCP Server is running and ready to accept connections\n'); await lifecycle; clearServerState(); process.stderr.write('TeamCity MCP Server connection closed\n'); } catch (error) { clearServerState(); process.stderr.write(`Failed to start server: ${error}\n`); process.exit(1); } } // Handle graceful shutdown process.on('SIGINT', () => { void shutdown(0); }); process.on('SIGTERM', () => { void shutdown(0); }); // Start the server main().catch((error) => { process.stderr.write(`Unhandled error: ${error}\n`); process.exit(1); });