what happened to the REST api? I had a nice little windows app that changed my wallpaper every X minutes randomly to one of my thousands of favourites, somewhen during the last few weeks it stopped working...
It's no longer supported, at the moment.
I'm afraid you'll have to rework your code to make it work again, a viable approach could be: load the page
%PAGE% is a random number between 1 and the total number of pages of favorites you have, load one of those wallpapers and download it.
Keep in mind that at the moment, only you can see all your favorites, the others can see up to the first 50 pages, so while requesting said page you should also provide your cookie session ID.