Application-Programming Interface is referred to as API. This technique enables two systems to communicate with one another by establishing a bridge between them. In general, there are two kinds of APIs: pull and push. For instance, when a company utilizes an HRMS solution for payroll and HR operations and a different accounting system for accounting operations, financial data must interact with one another in order to produce the intended outcomes. The accounting software receives the financial data via the HR system’s API. In this way, HR APIs can be integrated with a number of different systems. Integrating with an external system is a popular practice.