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Hoppscotch

Hoppscotch is an open-source API development platform that supports REST, GraphQL, WebSocket, Socket.IO, SSE and MQTT protocols. The application is designed as a PWA that works with low resource usage, offering customizable interface themes and various authentication methods.

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Hoppscotch

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hoppscotch · API Testing & Mocking

STARS80.7K
FORKS6.2K
COMMITS6.1K
CONTRIBUTORS342
VERSIONv3.0.1
UPDATEDyesterday
TypeScriptAPI ClientRest/graphqlSelf-HostedMIT

Common commercial products in this category: Postman, Insomnia, Paw

What can it do?
  • Using HTTP methods, you send requests to API endpoint and analyze responses.
  • You exchange real-time data through protocols such as WebSocket, Socket.IO and MQTT.
  • You create code snippets for requests, import cURL commands, and convert requests into shareable connections.
Heads up
  • • High number of open issues (885)
User reviews
  • • NeutralHacker News

    Hoppscotch: Open-source alternative to Postman

    “Had a similar issue. You have to use their browser extension: . Click on this extension and add the domain you want to query. Then on Hoppscotch, go to settings and click "use browser extension to send requests." I was using Altair's desktop app to handle CORS, but may switch to…”

  • • NeutralHacker News

    Hoppscotch: Open-source alternative to Postman

    “For those who have no idea what Postman and Hoppscotch are even after clicking the link: > "Hoppscotch is a ... web based API development suite. It was builtb ... with ease of use and accessibility in mind ... free-to-use ... Open Source”

Website GitHub

Verified against README · Oct 26, 2026 · source

My note

Alternative pages

Postman alternativesInsomnia alternativesPaw alternatives

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