API Terminology Handbook – Ultimate Guide to Rest API Terms

API Terminology Handbook - The Ultimate Guide to Rest API terms and Glossary

API stands for Application Programming Interface, which doesn’t really explain much. Think about it like this: An API receives inbound requests and sends outbound responses. You make a request, the API passes that request to a server, and then waits for the server’s response. As an application’s user interface (UI) lets users interact with it, an application programming interface (API) lets clients interact with the application. It’s just another way to interact with a system and its functionality.

This article aims to provide a comprehensive guide to REST API terms and glossary. We will explore different terms related to API, API economy, API lifecycle, API security, and other related topics.

By understanding these terms, you will be able to communicate more effectively with other developers, understand API documentation, troubleshoot issues,, and can clear a programming Interview.


APIs have become an essential part of modern software development, allowing applications and systems to communicate and share data efficiently. Understanding the terminology and concepts related to APIs is crucial for developers, architects, and other stakeholders to design, build, and maintain high-quality and secure APIs.