Can i already use subscriptions API and publish the app or use it just on my live store?

ManOfWool
Tourist
7 0 1

I want to use subscriptions on my own store, I don't want to sell the app.

 

1. Why do I need to request access to the subscriptions API via form, isn't it already live? If not, when will it be available? 

2. Can private apps use the subscription API?