Interface (API)

What is an interface?

An interface, often referred to as API (application programming interface), is the part of a program that is used for communication. In concrete terms, the interface is a transition point from a software system to other programs, which is made available for connection to the system. Data exchange or data processing takes place via this interface.

In companies, interfaces enable different systems to interact with each other. The individual activities are connected by interfaces. In object-oriented programming, an interface specifies which methods are or must be available in different classes.