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REST API Spy

ExtensionDeveloper Tools
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Overview

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

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!

Details

  • Version
    1.0.2
  • Updated
    August 7, 2026
  • Offered by
    Christian Aust
  • Size
    48.92KiB
  • Languages
    English
  • Developer
    Email
    datenimperator@gmail.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization
The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, please open this page on your desktop browser

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