For those interested:
I made an integration for the Cloud API of MCZ (I reverse engineered it).
I don’t know Python, I’m a C# developer, so this is far from the best implementation.
However, I wrote this for my MCZ Cute, and should probably work for others (with some slight modifications).
I’m still adding new features (sensors mostly) so keep an eye on the repo. It’s not in HACS yet, so you’ll have to add in manually in your custom_components folder.
If you’re a monster at Python, feel free to help me develop this.