After a long delay, we have decided to launch the new Windy API v3.0 that contains all models, levels and overlays as the main Windy.
Using this version of Windy API is free for the time being, as long as Windy logo and link to Windy website is visible on the map, and will remain clickable for most of the time, including all credits to data providers (ECMWF, OSM). We reserve the rights to change these conditions or to discontinue Windy API at any time.
Usage in mobile apps
It is prohibited to use, bundle, or include the Windy API client, data or any part of our intellectual property as a part of iOS or Android application without our prior written permission. This behavior will be treated as serious breach of our conditions and the app will be removed from Google Play or App Store as we have already done it a few times before.
Permission to use Windy API as a part of native mobile apps can be obtained after consensual agreement of placing buttons to download the native Windy app inside the user's native app.
And kudos to @ArneSeib who finished the new API in record time: