National Weather Service API
Free US government API for forecasts, alerts, and observations from the National Weather Service, no key required.
National Weather Service API is listed in Weather.
Auth No auth Pricing Free URL https://www.weather.gov/documentation/services-web-api Docs https://www.weather.gov/documentation/services-web-api
Key metrics
5 req/sec Rate limit Free, keyless (api.weather.gov, US only): no hard published limit but a fair-use policy - send a unique User-Agent, roughly 5 req/sec, and cache responses.
OpenAPI OpenAPI spec
Gotchas
No gotchas documented yet. Contribute one if you know a constraint we missed.
Labels
- No auth
No auth
Callable with no API key or login — lowest-friction to integrate.
forecast alerts government usa no-key