In times past the only avenue for communication to Service Desk Manager through web services involved using SOAP calls. More recent releases now also provide the ability to communicate through REST web services calls, and in fact the Service Management mobile application communicates via REST as well. After deploying REST you may wish to test the communication, but aren't sure how. I'd like to highlight a very useful document that provides a detailed step by step guide on how to use the tool "SoapUI" to test RESTful web services calls. If you're starting to prepare to use your own REST applications, or plan to use the mobile app, this is a great guide to assist in your testing.