API Sniffer - Endpoint Detector

A developer tool to debug and analyze API calls for testing.

API Sniffer is a powerful, lightweight developer tool designed to simplify API debugging, monitoring, and documentation. Whether you are reverse-engineering an app, writing documentation, or debugging network calls, API Sniffer completely eliminates the need to manually dig through the browser's Network tab. ✨ What's New in Version 2.0: Modern Developer UI: Completely redesigned with a clean, professional, and minimal interface. HTTP Methods: Now captures and displays request methods (GET, POST, PUT, DELETE, etc.) alongside the URL. Custom Blacklist: Added a settings panel to manually block specific domains (like analytics or tracking URLs). List Management: View endpoints in a scrollable list and delete irrelevant URLs individually. More Export Options: Added "Copy All" to clipboard and JSON export support! Enhanced Stability: Upgraded background service worker to prevent any data loss during long browsing sessions. 🔥 Key Features: 🚀 Real-time Monitoring: Automatically captures fetch/XHR requests silently as you browse. 🧹 Smart Filtering: Built-in filters ignore static assets (.png, .css, .mp4, etc.), while the Custom Blacklist lets you hide specific noisy domains. 📂 One-Click Export: Instantly copy all endpoints to your clipboard, or download them as a clean .txt or structured .json file for Postman/Insomnia. 🎯 Precision Control: Easily start, stop, or reset the recording process at any time. Remove single endpoints from the list without clearing everything. ⚡ Lightweight & Secure: Runs 100% locally in your browser. No external servers, no tracking, and it won't slow down your browsing speed. Perfect for Web Developers, Pentesters, Bug Bounty Hunters, and QA Engineers who need to analyze network traffic quickly and efficiently.