reaatech/mcp-server-starter-ts

These packages give you a production-ready MCP server with Express 5, pluggable auth, rate limiting, idempotency, structured logging, OpenTelemetry tracing, and dual Streamable HTTP/SSE transports. You'd adopt them to skip building the operational scaffolding around an MCP server—auth, observability, security middleware, and transport session management—and instead focus on writing tools. The most distinctive thing is that every concern (auth, observability, transport, tools) is a separate, independently installable package, but the engine package wires them together into a single middleware pipeline with auto-discovery of `.tool.ts` files.