Hoppscotch Has a Free Open-Source API Development Platform

Hoppscotch is a free, open-source API development ecosystem. It's a lightweight, fast alternative to Postman that runs in your browser. What Is Hoppscotch? Hoppscotch is an API client for testing REST, GraphQL, WebSocket, SSE, Socket.IO, and MQTT APIs. It's fast, beautiful, and works entirely in the browser. Key features: REST, GraphQL, WebSocket, SSE, Socket.IO, MQTT Collections and environments Team collaboration Request history Pre-request scripts Tests and assertions Code generation (20+ languages) Import from Postman, OpenAPI, cURL Self-hostable or use hoppscotch.io PWA (install as desktop app) Quick Start Just open hoppscotch.io — no signup needed. Or self-host: git clone https://github.com/hoppscotch/hoppscotch cd hoppscotch docker compose up -d REST API Testing Enter URL: https://api.github.com/users/torvalds Click Send See formatted response instantly Add headers, query params, body — everything in a clean UI. GraphQL Built-in GraphQL client with: Schema auto-completion Query