Multi-model weather: GFS, ECMWF AIFS/IFS and a 31-member GEFS ensemble, keyless point forecasts.
Meltema API is a free Weather API that requires no API key, is served over HTTPS and does not support CORS, so it should be called from a server.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Portuguese weather and climate data
Yes. The Meltema API is listed in the Weather category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The Meltema API requires no authentication, so you can start making requests without signing up.
Not directly. The Meltema API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The Meltema API is served over HTTPS, so it's safe to use in production.