InterceptX

About

InterceptX is a lightweight, high-performance developer tool that gives you complete control over HTTP headers in your browser. Perfect for testing APIs, debugging web applications, simulating client states, and auditing web security.

Key Features:
- Create and switch between multiple custom profiles for different environments.
- Add, modify, or remove both incoming request headers and outgoing response headers.
- Filter rules using specific URL wildcard patterns (e.g., *://api.example.com/*).
- Restrict header modifications to specific Resource Types (XHR/Fetch, Documents, Stylesheets, Scripts, and more).
- Secure, lightning-fast execution built on Manifest V3 declarativeNetRequest.
- Responsive, glassmorphic dark mode editor that acts as both a popup and a full-tab workspace.
- Export and import profiles as JSON for easy sharing and backup.

How to use it:
1. Open the extension popup or click "Dashboard" to open the full-screen editor.
2. Select or create a profile from the dropdown toolbar.
3. Click "Add Header" and enter the name, value, operation (Set, Append, Remove), and request/response direction.
4. Optionally, add specific URL filters to limit modifications to certain websites.
5. Toggle the global master switch to "Active" to start modifying headers.

Privacy & Permissions:
All configurations and headers are stored locally on your device via Chrome storage. The extension does not collect, log, or transmit any user data off-device.