Google has opened up their Google Play Developer Publishing API to all developers on the Play Store, which is great news for anyone looking to add some extra functionality to managing their apps. The new API makes it easier to manage in-app purchases and subscriptions, upload new APKs for beta testing or staged rollouts, and create and modify Play Store listings.
Overall, this Publishing API will make it significantly easier for developers to handle the management of their apps and listing, which should, in turn, create a better end user experience. If you’re interested, you can check out the full details of what the new API can do below.
source: Google Play Developers