go-apispec by antst

Generate OpenAPI 3.1 (Swagger) specs from Go source code — no annotations. Static analysis and call-graph tracing infer routes, params, request/response schemas for Gin, Echo, Chi, Fiber, Gorilla Mux and net/http. Deterministic YAML/JSON output for CI, plus a web UI and call-graph diagram. Maintained by ehabterra on GitHub, where it has earned 92 stars from the community.

go-redoc is an embedded OpenAPI/Swagger documentation ui for Go using ReDoc. Maintained by mvrilo on GitHub, where it has earned 95 stars from the community.

golang grpc gin. Maintained by pzhen on GitHub, where it has earned 33 stars from the community.