An increasingly interconnected world has placed eSIM (embedded SIM) technology at the forefront of enabling seamless and scalable mobile connectivity. A key enabler of this revolution are the eSIM Application Programming Interfaces (APIs) which provide the technical foundation for eSIM integration, management, and scalability across devices and networks. eSIM APIs whetherAndroid eSIM, iOS or meant forAPI partners and providers are vital for modern IoT and mobile networks.