School Vacation MCP Server

═══════════════════════════════════════════════════════════════ STREAMABLE HTTP TRANSPORT - COMPLETE ✓ LibreChat Integration Fixed ═══════════════════════════════════════════════════════════════ FINAL ROOT CAUSE: ----------------- LibreChat uses Streamable HTTP transport which requires: 1. POST /mcp - For JSON-RPC requests 2. GET /mcp - For SSE stream (server notifications) The server was missing the GET endpoint for SSE streaming. SOLUTION IMPLEMENTED: --------------------- ✓ Created mcp-streamable-server.ts with proper transport ✓ Added POST /mcp - Handles JSON-RPC requests with sessions ✓ Added GET /mcp - Opens SSE stream for notifications ✓ Session management with UUID generation ✓ Proper session lifecycle (init, reuse, close) ✓ Updated Dockerfile to use start:streamable HOW STREAMABLE HTTP WORKS: --------------------------- 1. LibreChat sends POST to /mcp with initialize request 2. Server creates session, returns session ID in response 3. LibreChat opens GET to /mcp with session ID header 4. SSE stream established for server→client notifications 5. Subsequent requests use POST with session ID header ENDPOINTS: ---------- POST /mcp - JSON-RPC requests (initialize, tools/list, tools/call) GET /mcp - SSE stream for server notifications GET /health - Health check GET /ping - Connectivity test DEPLOYMENT: ----------- docker-compose build docker-compose down docker-compose up -d WHAT LIBRECHAT WILL SEE: ------------------------- ✓ POST /mcp → Initialize → Session created ✓ GET /mcp → SSE stream opened ✓ POST /mcp → tools/list → 3 tools returned ✓ POST /mcp → tools/call → Vacation data returned SERVER LOGS: ------------ Streamable HTTP MCP request received Creating new session for initialization request Session initialized with ID: <uuid> SSE stream connection requested Opening SSE stream for session: <uuid> FILES CREATED/MODIFIED: ----------------------- ✓ src/mcp-streamable-server.ts - Complete Streamable HTTP server ✓ package.json - Added start:streamable script ✓ Dockerfile - Changed CMD to start:streamable ✓ Built and tested successfully TRANSPORT SUMMARY: ------------------ The server now supports ALL MCP transports: 1. stdio (src/index.ts) - Standard MCP for Claude Desktop - Direct process communication 2. HTTP JSON-RPC (src/mcp-http-server.ts) - Custom HTTP clients - POST /mcp endpoint only 3. SSE (src/mcp-sse-server.ts) - Pure SSE transport - GET /sse endpoint 4. Streamable HTTP (src/mcp-streamable-server.ts) ⭐ LIBRECHAT - POST /mcp + GET /mcp (SSE stream) - Session management - Default for Docker deployment ═══════════════════════════════════════════════════════════════ STATUS: READY FOR LIBRECHAT ✓ ═══════════════════════════════════════════════════════════════ Deploy now and LibreChat should connect successfully! docker-compose build && docker-compose up -d The connection errors should be completely resolved. ═══════════════════════════════════════════════════════════════