Application programming interfaces (APIs) enable telecommunication companies to capitalize on existing network infrastructure by facilitating third-party development of new business opportunities globally. There are many types of telecom APIs including advertising, billing, collaboration, and IoT. Telecom API business models include charging subscribers for access and third parties for API use, as well as creating application stores utilizing APIs. Telecom API aggregators now consider business models where they pay carriers for network access like SMS and then sell that capability to large brands, applying intelligence and analytics.