The Rally Java SDK by Rally provides interaction with the API, even though Rally Software does not maintain the kit. Resources explain how to obtain the Api Key and work with Maven. JAR dependencies are available at https://github.com/RallyTools/RallyRestToolkitForJava/wiki/User-Guide#setup
RingPlus, mobile virtual network operator, has announced one of the industry's first public cellular APIs: the RingPlus API. The API offers a carrier-grade wireless platform to the public. With the API, businesses and developers can completely control mobile phone service, and gain access to world-class mobile networks.