The GoCardless Pro Java SDK by GoCardless permits API interaction to access recurring payment capabilities. With existing resources, developers can create an application just like the one available on GitHub, that demonstrates how to recollect payments from subscriptions. More at https://github.com/gocardless/gocardless-pro-java-example
Over there, by the gum and the tabloid magazines, there's an API. Literally, it's a piece of plastic, but behind it is a company and the APIs that company uses to make the whole operation work. Blackhawk, a subsidiary of Safeway, distributes gift cards for many big-name stores in 90,000 retail locations. And while the cards have always been supported by backend systems, mobile is moving this ten year-old company to an open API approach.