OpenAPI Specification (OAS) tools for validating, parsing, fixing, converting, diffing, joining, and building specs; as well as generating client/servers/types from specs.
Self-documenting APIs for Go's net/http: wrap your ServeMux and it serves a /docs UI (Scalar, Swagger UI, Redoc, Stoplight) plus the generated OpenAPI 3.0/3.1/3.2 spec. Zero dependencies.
Open-source OpenAPI mock server with cloud hosting and local modes for development, testing, and CI. Generates realistic API responses from specs with latency simulation, error injection, proxy fallback, and request validation. Validated against 2,200+ real-world OpenAPI specs.
The world's most powerful OpenAPI breaking changes detector. Discover what changed between two OpenAPI specs, or a single spec over time. Supports OpenAPI 3.2, 3.1 and 3.0