The GoCoin PHP SDK by GoCoin interacts with the API to access bitcoin payment features. Usage demonstrates how to get exchange rates, get a list of merchant as admin, and get an invoice from production.
At TwilioCon in San Francisco today, Twilio is unveiling a new billing system for its API. This new in-app billing solution is called "Twilio Connect," and it provides a much simpler model for developers to implement customer billing when it comes to recurring charges for SMS and phone calls.
Moving money online is commonplace these days, and the simpler and faster the process can be, the more appealing it is. Ripple provides another option in the world of online payment solutions. It's an open source, almost free to use payment network that provides a simple and hassle-free way for anyone in the world to send money to anyone else. The Ripple API allows developers to use this functionality and integrate the payment system into other projects.