REST API Spy

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!