REST API Spy

by Christian Aust · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Capture, analyze, and inspect REST API requests in real time and export OpenAPI 3.0 specifications.

Users

+2 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#255K

#213K among extensions

Version

1.0.2

updated 7 Aug 2026

Users

monthly, 2 months

Latest, 16 Oct 2026: 5 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 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 REST API Spy

REST API Spy is a powerful developer extension for analyzing REST API requests (XHR and Fetch) directly in the browser. Key Features: - Real-time analysis of URL, HTTP method, request & response headers, payload, and response formats. - Clear tree structure sorted by host and path. - Header blacklist for filtering sensitive or irrelevant headers (e.g., User-Agent, Cookies). - Manual addition of descriptions and documentation per API endpoint. - One-click export in the official OpenAPI 3.0 specification format (JSON). Perfect for web developers, QA testers, and API designers!