API in terms of being able to publish to chevereto (with the usual options of uploads) and pull some sort of list or gallery from chevereto would be useful for me. I wouldn't be desperate for it as soon as v4 is released but by the sounds of the way v4 will become, I think API should be available within the first six months of the v4. Having said that, earlier reading about a possible desktop client (to be able to publish direct to chevereto), would be an awesome useful productive solution if you were to develop it first. Just my thoughtsUpdate 2019-11-06
Honestly I don't know if there's any crowd for getting the API first so please let me know if you care about that.
Hope to post more updates soon.