The application programming interface is known as the API. It is a collection of tools and protocols that software applications use to interact with others. Developers can access the functionality of other applications or services using APIs without having knowledge of how those applications or services were developed. They can be accessed using a variety of programming languages, including Java, Python, Ruby, and many others.
If you are interested in learning more about API then check out this video offered by Intellipaat. Upon watching this video you will get better understanding of what is API, about its working, uses and benefits -