An introduction to the Java 2 Platform, ... WebLogic Server and J2EE handle certain common programming tasks for you. ... The methods described above are all part of the standard J2EE Servlet API.

The SIP Servlet Specification (Java Specification Request 116), developed through the Java Community Process, provides a standard Java API programming model for delivering SIP-based services.

An application programming interface, or API, is a "go-between" that enables a software program to interact with other software.