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OpenAPI Specification (formerly known as Swagger Specification) is an API description format for REST APIs. An OpenAPI file allows you to describe your entire API, including available endpoints and operations on each endpoint, operation parameters input and output for each operation, authentication methods, contact information, license, terms of use and other information. The OpenAPI Specification is a community-driven open specification within the OpenAPI Initiative, a Linux Foundation Collaborative Project.
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Website Key Features
API Documentation
Automatically generate interactive API documentation that lets your users try out the API calls directly in the browser.
Code Generation
Generate server stubs and client SDKs for your API in various languages to speed up development.
API Testing
Use the OpenAPI Specification to create automated tests for your API to ensure it behaves as expected.
Versioning
Easily manage different versions of your API with the OpenAPI Specification, allowing for backward compatibility and smooth transitions.
Security Schemes
Define security schemes for your API, including OAuth2, API keys, and more, to ensure secure access to your API.
Validation
Validate your API against the OpenAPI Specification to ensure it meets the required standards and best practices.
Interoperability
Ensure your API can be easily consumed by clients in different programming languages thanks to the OpenAPI Specification's language-agnostic design.
Community Support
Benefit from a large and active community that contributes to the development and improvement of the OpenAPI Specification.
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Additional information
OpenAPI Initiative
The OpenAPI Initiative (OAI) was created by a consortium of forward-looking industry experts who recognize the immense value of standardizing on how REST APIs are described. As an open governance structure under the Linux Foundation, the OAI is focused on creating, evolving and promoting a vendor neutral description format.
Swagger
Originally developed by SmartBear Software, Swagger was the first implementation of the OpenAPI Specification and remains one of the most popular tools for designing and documenting APIs with OpenAPI.
Tools and Libraries
A wide range of tools and libraries are available for working with the OpenAPI Specification, including editors, validators, code generators, and more, supporting a variety of programming languages and frameworks.
Adoption
The OpenAPI Specification has been widely adopted by companies and organizations around the world, including Google, Microsoft, IBM, and many others, as the standard for describing REST APIs.
HTTP headers
Security headers report is a very important part of user data protection. Learn more about http headers for openapis.org