Want to learn more about OpenAPI? Take our new OpenAPI Fundamentals training course LEARN MORE >
The world's most widely used API description standard
All OpenAPI PublicationsHow to Get InvolvedView Latest OpenAPI SpecView Latest Arazzo SpecView New Overlays SpecWhat is OpenAPI?
The OpenAPI Specifications provide a formal standard for describing HTTP APIs.
This allows people to understand how an API works, how a sequence of APIs work together, generate client code, create tests, apply design standards, and much, much more.
3 Benefits of OpenAPI
As the most widely used API description languages:
Commonality of use and support by tool vendors, meaning flexibility in tool vendor selection.
Commonality of knowledge by developers and engineers, meaning flexibility in staffing.
Abstraction of API description facilitating adoption of innovations in API behaviors while avoiding total rewrites.
Events
February 18 - 20, 2026
DEVELOPERWEEK 2026
OpenAPI Summit
San Jose Convention Center
The OAI Summit is an integral part of DeveloperWeek