Who is REST API Client for?

REST API Client is an open-source project built for developers and API testers.

What platforms does REST API Client run on?

REST API Client runs on the web, embeddable surfaces, and Android. It can also be self-hosted.

Is REST API Client still maintained?

Unverified. REST API Client has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to REST API Client?

Similar projects tracked by PulseGate include REST API Client, API Tester - REST Client, and API Request Tester.

Who develops REST API Client?

REST API Client is developed by onyxwizard.

When did REST API Client launch?

REST API Client first shipped in 2026.

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REST API Client

Name: REST API Client
Author: onyxwizard

github.comAPI design, testing & docs

REST API Client is an open-source Postman-like API testing tool distributed as a Firefox extension for desktop and Android. It lets developers construct requests and inspect API responses directly in Firefox.

Open SourceWebEmbeddableAndroidSelf-hosted

Visit github.com

Overview

6 features

REST API Client sits in PulseGate's API design, testing & docs category. It focuses on testing and debugging REST APIs without relying on a hosted API client. It is built as an open-source project for developers and API testers. REST API Client is open source under the Open Source license. It ships for the web, embeddable surfaces, and Android, and it can be self-hosted.

It is developed by onyxwizard, and it first shipped in 2026. Among its 6 catalogued features are HTTP requests, request builder, and response inspection.

Summary written by a language model from the project’s public pages.

HTTP requests
Request builder
Response inspection
API testing
Firefox support
Android support

Built with & integrations

Runs on

BrowserEmbeddableAndroidSelf-hosted

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed12 Sept · 04:28 UTC
REST API Client Tester verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about REST API Client

What is REST API Client?: REST API Client focuses on testing and debugging REST APIs without relying on a hosted API client. It is catalogued under API design, testing & docs on PulseGate.
Who is REST API Client for?: REST API Client is an open-source project built for developers and API testers.
Is REST API Client free?: Yes — REST API Client is open source under the Open Source license and free to use.
What platforms does REST API Client run on?: REST API Client runs on the web, embeddable surfaces, and Android. It can also be self-hosted.
Is REST API Client still maintained?: Unverified. REST API Client has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to REST API Client?: Similar projects tracked by PulseGate include REST API Client, API Tester - REST Client, and API Request Tester.REST API Client API Tester - REST Client API Request Tester
Who develops REST API Client?: REST API Client is developed by onyxwizard.
When did REST API Client launch?: REST API Client first shipped in 2026.

At a glance

Pricing: Open Source
Platforms: Web · API
Languages: English
License: Open Source
First seen: 12 Sept 2026
Built for: developers and API testers
Model: Open source
Solves: Testing and debugging REST APIs without relying on a hosted API client.

Registered as

Firefox Add-ons: api

Developer

onyxwizard

Index record

Indexed: 12 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 12 Sept 2026

Identity audit (13)

Slug: rest-api-client-tester-github-com
Lifecycle state recorded: 12 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 12 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 12 Sept 2026
Canonical URL: https://github.com/onyxwizard/api-client

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