take-group/hoppscotch

Hoppscotch is an open‑source, cross‑platform API development tool (available as a web app, desktop PWA, and CLI) that lets developers design, test, and mock REST, GraphQL, WebSocket, SSE, MQTT, and other HTTP‑based services, with rich features like request/response handling, theming, offline use, and collaborative collections. It’s aimed at engineers and teams who need a lightweight, customizable alternative to Postman for rapid API prototyping, debugging, and sharing interactive API documentation.