OpenAPI
The OpenAPI Specification (OAS) is a community-driven, vendor-neutral standard for describing HTTP APIs in a machine-readable format (YAML or JSON). It enables both humans and computers to understand API capabilities without source code or documentation, facilitating interactive docs, code generation, and testing. It is for API developers, designers, and tooling vendors.
✨ Key features
- Defines a standard, language-agnostic interface description for HTTP APIs.
- Supports REST APIs and can describe existing APIs without rewriting.
- Documents are machine-readable in YAML or JSON formats.
- Enables interactive documentation, code generation, and test automation.
- Does not mandate a specific development process (design-first or code-first).
🎯 Use cases
- Generate interactive API documentation.
- Generate client SDKs and server stubs.
- Automate API testing.
- Design APIs before implementation (design-first).
- Document existing APIs without code changes.
⚠️ Good to know
Not all services can be described by OpenAPI; it is not intended to cover every possible style of HTTP APIs, but does include support for REST APIs.
❓ FAQ
What is the OpenAPI Specification?
It is a standard, language-agnostic interface description for HTTP APIs, allowing humans and computers to discover and understand API capabilities without source code or documentation.
What formats can OpenAPI documents be in?
OpenAPI documents are represented in YAML or JSON formats.
Does OpenAPI require rewriting existing APIs?
No, it does not require rewriting existing APIs; it only requires describing the service's capabilities in the OpenAPI structure.
What types of APIs does OpenAPI support?
It includes support for REST APIs, but not every possible style of HTTP API.
📊 Repository
🤖 Overview, features, install steps and FAQ were generated from the project's README on Sep 4, 2026. Always check the original source before running commands.