The new REST API has been released, we just made an announcement but I have some extra links that might come in handy as well. To get the 1.1 update you’ll need to backup, update, and restore your EPIC unit, we have a workshop to walk you through that.
If you want to go straight to the usage guide check out the developer page, but even with that I use the API reference a lot. I also have a pretty basic use case written up on the forum if you want to get an idea of how it can be used.
Happy coding!
EDIT; almost forgot the training workshop, good thing @beno has you covered! Definitely follow that before attempting to use the new API.