The HiPay iOS SDK by HiPay interacts with the API to access payments' features that can be integrated into a mobile application. The repository contains the SDK as well as a demo application with a simple payment screen.
The Web Payments Working Group has published the first public drafts of payment specifications which include a Payment Request API, payment method identifiers, and basic card payment. The basic idea behind the specifications is to make payments easier and more secure for end users.
OFX, a foreign currency exchange company, last week announced that its OFX Developers program has exited beta and is now open to all developers. OFX Developers offers a Payments API that gives developers 24/7 access to the global currency markets at rates more competitive than banks'.