Xchangeonline is a tool that provides currency conversion and rounding functionality that can be integrated with other applications. Their selling point is that, unlike other currency conversion tools available, their service is easy for anyone to use, reliable and affordable. The Xchangeonline API makes it possible for third party developers to access this functionality.
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.