Hey all, I'm an engineer at PhotoShelter and have been leading dev on Astra since January. The product grew out of a decade of infrastructure work here at PS, combined with simplifications we as devs wanted to see in existing products like AWS (e.g., we felt the storage API should be simple enough to interact with directly using curl). The goal is to do [storage + transforms + delivery] in an intuitive way, which a lot of folks have been receptive to. Dev-wise, we'll be tackling more image transforms and building a video type next.
Check out the API docs above, and let me know if you have any questions. :-)
Astra by Photoshelter