Cisco has made a decision to keep CUCM stuck to the SOAP world but it does offer REST based web services on Unity Connection. It offers multiple interfaces through which we can perform CRUD (Create, Read, Update and Delete) operations, control audio recordings, handles notifications etc. For this particular post, since our primary objective is to get familiar with the usage of Postman rather than the actual understanding of the APIs, we will be restricting ourselves only to one particular API that handles CRUD operations. This API is called Cisco Unity Connection Provisioning Interface or CUPI.