API v4 apps are currently failing to load. Calls to https://api4.windy.com/api4/auth rimout after 30 seconds with a 502 response.

start with the samples/tutorials at https://api4.windy.com/. just copy the sample html as is into your own html file, put it on your web server, and look at the resulting page. make changes as needed. the samples cover a lot of ground in terms of typical changes folks might be interested in.

store.set('isolines', 'pressure');

@Gkikas-LGPZ with API v4, windy is offering both free and paid versions of the API. See Ivo's v4 announcement.

1. you'll be doing a little bit of refactoring - but likely your API calls and use of leaflet and mostly unchanged.
2. similar
3. not that i am aware of
4. not that i am aware of

@saaneuvos said in Guide for dummies: How to load API 4?:

testAPI4.php

ah, so the address is https://www.sääneuvos.fi/test/testAPI4.php.

when i try load that page, i see the js console is reporting the following error:
Windy API used on unauthorized domain

Have you authorized your domain (www.sääneuvos.fi) in your API config (https://api4.windy.com/api-key/)? If you have, ivo's code might be having issues with the special characters in your domain name (ä)...

have you looked at the documentation samples:
https://api4.windy.com/examples/hello-world/

once you have a reference to map, you can use it as documented in leaflet documentation.

hi @ivo - any thoughts about this? forcing a refresh of the model data and the view without having to reload the whole page? this appear to be an issue in https://www.windy.com/ as well - no auto update.

@Suty Excellent! thank you. Looking forward to news on this.

@Suty Following up on my prior reply - I just want to make sure I fully understand. the API currently exposes ECMWF data (per https://api.windy.com/map-forecast/pricing) but comes with the restriction that it is "for internal use only" - which I interpret means it can be used for internal facing "corporate" apps, but not for web-facing "public" / "reseller" / "service bureau" situations like mine. I want to be sure that you mean that Windy intends to continue to enforce those terms despite the public copyright granted by ECMWF to this data?

@Suty excellent! looking forward to this change when it gets deployed. Cheers - Jeremy

@Suty thanks for the update. not the answer I was hoping for - but is what it is. Cheers - Jeremy

@Suty said in Windy API Availability of ECMWF Data ?:

@fastseas Hello, I will open the topic with colleagues on our next meeting and let you know.

Hi @suty - wondering if you have any update on this? If nothing yet, let me know when i should check with you again. Thanks!

@Suty said in Map Forecast API - Days 10-15 ?:

@fastseas Regarding to info I have now, it is planned to offer same conditions in our API as they are in our app.

@suty thanks for chasing this down. do you have a rough ETA as to when this change might be delivered? e.g. 1 week / 1 month / 3 months / 6 months / longer? Thanks!

@Suty Excellent! thank you. Looking forward to news on this.

@Suty Thank you. standing by.

Hello - the ECMWF was on a multi-year staged journey to move toward a more open licensing model - which they completed on October 1, 2025. Now their entire Real-time Catalogue has CC-BY-4.0 licensing (attribution required) - including for commercial purposes. With this development, can Windy now loosen Windy API license terms and restrictions on ECMWF data?

Thanks,
Jeremy

Hello - I am a long time API customer. Would it be possible to expand API forecast duration from 1-10 to 1-15 days (same as the consumer Windy.com site).

Thanks,
Jeremy

re-bump.

I'm concerned as we're coming up on this Jan 1 date:

"Since we decided to change our business strategy to focus on B2B opportunities, we regret to inform you that the free Windy API service will be discontinued, effective as of January 1, 2020."

Can someone at Windy please perk up.

Thanks,
Jeremy