Hoppscotch

Open-source API development in the browser — instant, lightweight, and self-hostable.

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What is Hoppscotch?

Hoppscotch is an open-source API development environment that runs entirely in the browser — open the site and start sending requests with no download or signup. It supports REST, GraphQL (with schema explorer), WebSocket, SSE, Socket.IO, and MQTT, plus collections, environments, scripted pre-request and test hooks, and team workspaces in the cloud edition. Because the whole platform is MIT-licensed, companies can self-host Hoppscotch behind their firewall for full data control — a popular setup for teams that can't send API traffic through third-party clouds. With well over 70k GitHub stars, it has become the standard lightweight alternative to Postman: nearly zero footprint, keyboard-driven, and fast, while still covering the everyday 90% of API work.

Key Features

Runs in the browser — zero install, works without an account

REST, GraphQL, WebSocket, SSE, Socket.IO, and MQTT support

Collections, environments, and scripted test hooks

Self-hostable (MIT license) with admin dashboard and SSO

Team workspaces and real-time collaboration in the cloud edition

Use Cases

Quick API checks without launching a desktop app
A self-hosted API client for security-restricted environments
Testing WebSocket and MQTT endpoints alongside REST
Lightweight shared collections for small teams

How to Use Hoppscotch

1Open hoppscotch.io in any browser — no signup needed
2Compose a request, choosing protocol and auth
3Save into collections and define environments
4Optionally sign in for sync, or self-host the platform for your team

Best For

Developers who want an instant, no-install API clientCompanies self-hosting tooling for complianceOpen-source-first teams replacing Postman

FAQ

Is Hoppscotch really free?

Yes. The hosted app is free to use and the entire platform is MIT-licensed open source. Paid cloud and enterprise editions add team workspaces, SSO, and support.

Can I self-host Hoppscotch?

Yes. Hoppscotch ships Docker-based self-hosting with an admin dashboard, so teams can run the full platform — including team collaboration — on their own infrastructure.

How is Hoppscotch different from Postman?

Hoppscotch is browser-first, open source, and intentionally lightweight, focusing on fast request work. Postman is a heavier full-lifecycle platform with mocks, monitors, and governance built in.

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