API

An Application Programming Interface (API) acts as a messenger or a set of defined rules that allows different software applications to communicate and interact with each other. It defines the methods and data formats that applications can use to request and exchange information, abstracting away the underlying complexity of each system. Think of it like a restaurant menu: it tells you what you can order (requests) and what kind of meal you'll get back (responses) without needing to know how the kitchen prepares the food.