The AWS Pinpoint Java Sample Code demonstrates how to access cloud services. See the example at https://github.com/aws/aws-sdk-java/blob/master/aws-java-sdk-pinpoint/src/test/java/com/amazonaws/services/pinpoint/smoketests/AmazonPinpointModuleInjector.java
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.