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OpenAPI vs. Swagger

Blog post from Postman

Post Details
Company
Date Published
Author
The Postman Team
Word Count
1,225
Company Posts That Month
14
Language
English
Hacker News Points
-
Post removed?
No
Summary

Swagger 2 and OpenAPI 3 are specifications for describing RESTful HTTP APIs using YAML or JSON, both aiming to facilitate API design, documentation, and lifecycle management. OpenAPI 3, evolving from Swagger 2, introduces several enhancements such as centralized reusable components, expanded JSON Schema support, and improved security modes. The development of these specifications began with the creation of the Swagger Specification by the Wordnik team in 2011, which later became popular for formal API descriptions, leading to its donation to the OpenAPI Initiative in 2015. OpenAPI 3's advancements include more flexible data modeling with JSON Schema, support for defining asynchronous communication patterns through callbacks and webhooks, and the ability to document APIs with multiple examples and descriptions. These improvements aim to create more consistent and accurate API descriptions, enabling better collaboration and understanding among developers while maintaining the same core functionalities shared with Swagger 2.

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