The Coinkite PHP SDK by Coinkite allows API interaction to access bitcoin features, useful for developers and merchants interested in payment web-based services. API documentation is available at https://docs.coinkite.com/api/index.html
Thirteen APIs have been added to the ProgrammableWeb directory in categories including Cryptocurrency, Games, and Payments. Highlights include the CarbonDoomsDay API which provides CO2 levels public data for applications and the MakePrintable API for analyzing 3D printable content.
Mobile payment service Venmo, which is owned and operated by PayPal, abruptly shut off new developers from its public API, which handles payment invoices and distribution of receipts to external web services. Venmo had created confusion after first stating that it was shuttering its API altogether.