What's the Difference Between OpenAPI Types 2.0, 3.0, and 3.1?

What’s the Difference Between OpenAPI Types 2.0, 3.0, and 3.1? What is OpenAPI? The OpenAPI Specification (OAS API) is a widely adopted, standardized format for describing REST APIs. You can use OpenAPI to detail every part of your API, including endpoints, operation parameters, request responses, and authentication flows. The OpenAPI format is easy for both developers and machines to read and und