In the telecommunications world, APIs play important roles at different levels. The Open Mobile API (OMAPI) for instance, allows mobile applications to access different secure elements such as a UICC or an eUICC. While the Java API establishes a common architecture and command structure used on Java Cards.
GlobalPlatform SEAC technology is a gatekeeper mechanism between the mobile OS and UICC applications. Its function is to enable access control for UICC applications based on access rules stored in the UICC. The GSMA TS.27 NFC Handset Test Book defines test cases that validate the correct device side implementation of this control stack, the so-called "access control enforcer".