What AI says about National Weather Service API

The National Weather Service (NWS) API provides developers with access to forecasts, alerts, observations, and other weather data. It is an open, free-to-use data service designed with a cache-friendly architecture and uses JSON-LD to promote machine readability. The API is hosted at api.weather.gov and supports multiple formats (default GeoJSON; JSON-LD, DWML, OXML, CAP, ATOM), with authentication via a required User-Agent header.