reaatech/mcp-server-starter-ts

These packages give you a full MCP server—core types, an Express 5 framework with a composable middleware pipeline, tool registration and auto-discovery, dual Streamable HTTP and SSE transports, and built-in observability with Pino logging, OpenTelemetry tracing, and Prometheus metrics. You'd adopt them to build, secure, and operate an MCP server without wiring up authentication, rate limiting, idempotency, session management, or structured logging yourself. The most distinctive thing is that every concern—auth, rate limiting, idempotency, sanitization, tracing, metrics—is a separate, independently installable package that plugs into a single Express middleware pipeline, so you can compose exactly what you need.