API, an abbreviation of application program interface, is a set of routines, protocols, and tools for building software applications. A API builts it easier to develop a program by providing all the building blocks for the user. A programmer then puts the blocks together. Although APIs are designed for programmers, they are ultimately good for users because they guarantee that all programs using a common API will have similar interfaces. This makes it easier for users to learn new programs.
Customers have asked for this functionality for multiple reasons. To parse the subscriber information in blocks from the website and send campaign or parse content dynamically from the client server on daily basis and trigger daily content.