API Tester

by AA · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

API testing tool with side panel interface

Users

+2 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#136K

#113K among extensions

Version

1.4

updated 18 Jun 2026

Users

monthly, 10 months

Latest, 16 Oct 2026: 27 usersMove the mouse over the chart for any month

Ratings count

monthly, 10 months

Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About API Tester

API Tester is a Chrome extension that provides a comprehensive API testing tool with a side panel interface. It allows users to: Test APIs directly from the browser with support for various HTTP methods Organize requests into collections with authentication settings Validate responses using multiple validation types (status codes, response time, contains text, etc.) Manage authentication with support for API keys, Bearer tokens, and Basic auth Run test suites and view detailed results in an intuitive interface The extension operates through a side panel that can be opened from any webpage, making it convenient for developers to test APIs while browsing documentation or working on web applications. It includes features similar to Postman but integrated directly into the Chrome browser for quick access and testing.