The world's most widely used API description standard
What 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