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.
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The world's most widely used API description standard
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What is OpenAPI?
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.
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December 9 - 11, 2025
apidays Paris 2025
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