The Telerik Android Sample Code by Telerik demonstrates API interaction in a QR code that is also available on Google Play. When users click on the video demo, they will see mobile device interaction. The sample app can be found at https://play.google.com/store/apps/details?id=com.telerik.examples
And the source code at https://github.com/telerik/Android-samples/tree/master/Store-Demo
Mastercard recently announced the Mastercard Innovation Engine. The engine acts as a marketplace for next generation digital customer experiences. The marketplace allows Mastercard and collaborators to offer API access to customer-focused digital experiences through plug and play solutions.