API Interceptor

Block API requests that match your custom regular expressions. Simplify front-end testing by simulating network failures without ever reloading your web page.

Features

• 🚫 Block requests using custom regex patterns
• 🎯 Target specific APIs with precise pattern matching
• 💾 Persistent settings - your patterns and state are saved
• ⚡ Real-time control - enable/disable blocking instantly
• ✅ Pattern validation - validates regex before applying
• 🔒 Privacy-focused - minimal permissions, no data collection

How to Use

1. Click the extension icon to open the popup
2. Enter a regex pattern to match URLs you want to block (e.g., .*api\.example\.com.*)
3. Click "Save & Apply" to save your pattern
4. Toggle the switch to enable/disable blocking
5. Your settings persist across browser sessions

Examples

Block all requests to a specific API:

.*api\.example\.com.*

Block all API endpoints:

.*\/api\/.*

Block analytics services:

.*analytics.*

Permissions

• declarativeNetRequest - Required to block network requests
• storage - Required to save your settings
• host_permissions: <all_urls> - Required to intercept requests on all websites

Privacy

This extension does not collect, store, or transmit any personal data. All settings are stored locally on your device.