The PayPal Invoicing Ruby SDK by PayPal allows developers to integrate the PayPal Invoicing API's methods for creating and managing invoices into their Ruby projects and applications. Code examples and sample applications are provided in the documentation.
Square has launched the Register API for Android only a couple of months after releasing the API for iOS. The API allows developers to build end to end point-of-sale solutions that utilize Square's entire payment platform, or that integrate with third party infrastructure and applications.
Ten APIs have been added to the ProgrammableWeb directory in categories including Cryptocurrency, Payments, and Project Management. Highlights include a low latency, high performance email service from SparkPost to its European customers, and AWS X-Ray SDKS. Here's a rundown of the latest additions.