OpenAPI Specification (formerly known as Swagger)

The OpenAPI Specification (formerly Swagger) is a standardized way to describe how a web service or API functions. It provides a clear, structured document that outlines what the API does, what data it expects, and what it returns. This helps developers understand how to interact with the service without needing to read extensive code or documentation. Essentially, it acts as a blueprint or manual for APIs, enabling easier development, testing, and integration across different systems and teams.