Our API directory now includes 56 billing APIs. The newest is the Merchee API. The most popular, in terms of mashups, is the Stripe API. We list 5 Stripe mashups. Below you'll find some more stats from the directory, including the entire list of billing APIs.
The rise of Bitcoin has resulted in the development of a variety of services that enable individuals and companies to track Bitcoin, create and manage Bitcoin wallets, and perform transactions using the cryptocurrency.