The new API will use headers to modify the version and format of the response. Proxies are more likely to reach the limit, whereas requests directly from clients are not likely. If the rate limit is execeed a request will return with an error, and may be retried after the limit clears (typically within 5 seconds). The rate limit is not public information, but allows a generous amount for typical use. As a public service of the United States Government, we do not charge any fees for the usage of this service, although there are reasonable rate limits in place to prevent abuse and help ensure that everyone has access. PricingĪll of the information presented via the API is intended to be open data, free to use for any purpose. Operational issues should be reported to use questions can be asked on the API github site. The API is based upon of JSON-LD to promote machine data discovery. The API was designed with a cache-friendly approach that expires content based upon the information life cycle. The National Weather Service (NWS) API allows developers access to critical forecasts, alerts, and observations, along with other weather data.
