What is an API?

An API, or Application Programming Interface, refers to a set of rules and protocols that enables different software applications to communicate and interact with each other. This interface allows developers to access specific features or data from another application or service without having to understand the internal workings of that application.

APIs serve as an intermediary that facilitates requests and responses between clients (like front-end applications) and servers (back-end services or databases). They are essential in modern software development as they support integration, allowing various applications to function together smoothly, share data, and enhance functionality.

For instance, when a developer wants to integrate a payment processing system into an e-commerce application, they can use a payment service's API to handle transactions, ensuring security and efficiency. This capability is vital in today's interconnected digital landscape.