The GoCardless Java Client is the official and simple Java interface to the GoCardless API. GoCardless is a service that lets users accept online payments. With the API, users can create subscriptions and automated bills. In addition, the API can read existing resources and create bills under a pre-existing authorization.
Stronghold has released a set of APIs that developers can use to add to apps a variety of payment instruments including Bitcoin, Ethereum, and Lumens. The APIs also allow apps to leverage Stronghold platform capabilities such as generate quotes, trade cryptocurrencies, and get available venues.