openapi3

fastapi

+576

FastAPI framework, high performance, easy to learn, fast to code, ready for production

usebruno/bruno

+114

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

scalar/scalar

+27

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern REST API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

voiden

+25

Design, Test and Document APIs in plain Markdown. Compose Requests with API blocks. Reuse, Replace & Version everything just like code. Offline, Truly Git Native, No Lock-in.

openapi-generator

+21

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

huma

+19

Huma REST/HTTP API Framework for Golang with OpenAPI 3.1

swagger-ui

+16

Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.

apache/apisix

+14

The Cloud-Native API Gateway and AI Gateway

mockoon

+11

Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.