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API Request Builder

A Postman-style API client inside your side panel.

Full API client with collections, environments, scripts, and request history (Postman Lite).

  • Side panel
  • Command palette
Add to Chrome(opens the Chrome Web Store in a new tab)or pressCtrlShiftSpace
One Panel Search tools

API Request Builder

Side panel

Collections

Ready01 / 04

01Features

What it does

  1. 01Collections
  2. 02Environments
  3. 03Request editor
  4. 04Pre/post scripts
  5. 05History
  6. 06Response diff

02Use cases

When you'll reach for it

Replay a request from DevTools with new headers
Compare two API responses

How to open it

  1. 1

    Side panel

    Click the One Panel icon in the toolbar and search for “API Request Builder”.

  2. 2

    Command palette

    Press Ctrl + Shift + Space on any page and type its name.

Privacy

  • Runs entirely inside your browser. No account, no analytics, no remote code.

Keep going

Pairs well with

API & HTTP

HTTP Interceptor

Intercept and modify HTTP(S) traffic: redirects, headers, API mocks, GraphQL overrides, script injection, and a live network log.

Web

URL Toolkit

Parse, encode, decode and clean URLs with a query-param editor.

Web

Link Toolkit

Extract internal and external links from the current page.

Web

Image Links

Preview every image on the page, audit alt text, export the list, and download images or a ZIP.

Web

Page Information

Title, meta, canonical, Open Graph and Twitter card details for the page.

Web

Tech Stack Detective

Detect frameworks, CMS, analytics, and CDNs used on the active page.

Get API Request Builder and 80 more

One install adds every tool to your side panel. No account, nothing to configure.

Add to Chrome(opens the Chrome Web Store in a new tab)