Hoppscotch: Open-Source Alternative to Postman

1. Hoppscotch

   1 240 72,619 9.7 TypeScript

   Open source API development ecosystem.

   

   The website linked is not a landing page, but the actual tool, which is based purely on JS (Vue and Typescript to be precise). Here is the Github repo:

   https://github.com/hoppscotch/hoppscotch

2. SurveyJS

   surveyjs.io featured

   JavaScript Form Builder with No-Code UI & Built-In JSON Schema Editor. Keep full control over the data you collect and tailor the form builder’s entire look and feel to your users’ needs. SurveyJS works with React, Angular, Vue 3, and is compatible with any backend or auth system. Learn more.

   

3. insomnia

   2 248 36,716 9.8 TypeScript

   The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

   

   I've been using https://insomnia.rest/ and I am a massive fan. From the ability to make dependent API calls to say log in with one API call, and inject login tokens into the other from the first's response is amazing!

   Overall this tool has been my go-to for 3 years now.

4. nightingale-rest-api-client

   3 6 812 5.4 C#

   A modern, resource-efficient REST API client for Windows

   

   I really like https://nightingale.rest/

5. RESTer

   4 2 367 9.3 JavaScript

   A REST client for almost any web service (Firefox and Chrome Extension)

   

   Nowadays I am quite satisfied with the RESTer firefox addon: https://github.com/frigus02/RESTer. This does look neat but there is no explanation on how to install it locally, and telemetry is enabled by default.

6. probster

   5 1 16 10.0 Go

   A simple GTK app for http testing

   

7. ht

   6 41 6,637 8.5 Rust

   Friendly and fast tool for sending HTTP requests

   

8. restclient.el

   7 24 1,977 0.0 Emacs Lisp

   Discontinued HTTP REST client tool for emacs

9. Stream

   getstream.io featured

   Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.

   

10. RESTED

    8 1 297 0.0 JavaScript

    A REST client for browsers

    

    I often use the RESTED firefox extension, which covers like 90% of my adhoc http request needs: https://github.com/RESTEDClient/RESTED

11. desktop

    9 11 3,513 3.1

    🚀 HTTPie Desktop — cross-platform API testing client for humans. Painlessly test REST, GraphQL, and HTTP APIs. (by httpie)

    

12. prestige

    10 15 389 0.0 TypeScript

    A text-based HTTP client in the browser. An interface-less Postman.

    

13. ob-graphql

    11 1 18 10.0 Emacs Lisp

    GraphQL execution backend for org-babel

    

    There are also good options for GraphQL. I particularly like embedding the calls in org mode[1].

    [1] https://github.com/jdormit/ob-graphql

14. httpyac

    12 6 606 8.4 TypeScript

    Command Line Interface for *.http and *.rest files. Connect with http, gRPC, WebSocket and MQTT

    

    There's also https://httpyac.github.io/ which has both standalone CLI and VS Code extension versions – might be interesting to explore.

15. httpie

    13 134 35,995 6.6 Python

    🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more. (by httpie)

    

    Httpie is what I use for this. I use shell scripts, with httpie commands which look very much like http syntax.

    https://github.com/httpie/httpie

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