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
This week Google announced support of three new APIs in it's upcoming beta release of Chrome 61. These APIs, integrated from existing W3C standards, include the Payment Request API for making payment checkouts easier, the Web Share API for implementing native sharing capabilities and the WebUSB API.
Mastercard has launched a new platform for developers that features 25 commerce APIs providing a wide range of capabilities across payments, data services, and security. Some of these APIs are experimental and can be used to test new cutting-edge technologies and applications.
Payment Rails has launched its Global Payout API which provides applications payout capabilities such as international ACH, real-time currency conversion, and global mass payouts. The platform provides access to a network for sending payouts using SWIFT, local banks, and other methods.