Monocle‑API is a lightweight Node.js router for building RESTful APIs on top of Connect/Express that enforces JSON‑Schema‑based validation, supports server‑side symlinks, property‑filtering, caching and selective callbacks for high performance. It’s aimed at backend developers who want a consistent, flexible and fast way to define resources with automatic validation, fine‑grained response control and built‑in caching without writing boilerplate code.