The Chargify Symfony PHP SDK by Jake Litwicki allows developers to integrate the Chargify API v1 and v2 into their applications built with Symfony 3, a PHP web development framework. This SDK requires PHP 7.
The Currency Cloud, cross border payment as a service provider, has enabled developers to integrate international payment processing with an API: XBPConnect. Prior to the Currency Cloud, payment/invoice software required users to leave the platform and engage a third party to process an international invoice. The Currency Cloud allows cross border and multi-currency transactions from a single platform. The API allows developers to integrate the functionality into existing apps and platforms.
PayOnDelivery, online payment platform that doesn't charge until delivery, has announced the PayOnDelivery API. Third party apps and websites may use the API to integrate payment processing. Developers have full access to the PayOnDelivery platform, including its keystone feature that refuses to release funds until the product lands in a consumer's hands.