- API endpoint checks if a user's public IP is in IP Crawl's catalog and returns a JSON response with 'found' (boolean), 'ip' (string), and 'checkedAt' (timestamp).
- Use cases include monitoring for changes in IP exposure to detect potential security risks like exposed webcams, with alerts triggered when 'found' status flips.
- The API degrades gracefully by returning 'found: false' when IP resolution fails or the database is cold, avoiding server errors.
- Response caching is managed via 'checkedAt', where differences from 'Date.now()' indicate freshness, with up to ~5 minutes for browser cache.
- Example implementation shows hourly checks via JavaScript, with logging based on changes in 'found' status to alert users.