Yeah, that integration isn’t fully stable yet on the EU side—most of the working setups are still tied to US endpoints.
That said, you can still make it work with Retell by routing through a middleware (like a proxy or server function) to handle the API calls and avoid region conflicts. I’ve set up similar workarounds for clients already.
If you want, I can help you get a reliable setup running in the meantime
@drhhss