Measured is a suite of Node.js libraries that let developers define, collect, and report application‑level metrics (counters, gauges, timers, histograms, etc.) in a way modeled after Dropwizard Metrics. It provides a core metric API, a self‑reporting registry, utilities for instrumenting Node servers (including HTTP middleware), and optional reporters such as a SignalFx integration, making it useful for backend engineers who need to monitor performance and operational health of Node applications.