Hey Product Hunt! 👋 I built 404Watcher after seeing the same problem over and over. Facebook keeps charging per click even when the landing page returns a 404 or 503. There's no native alert, no warning, nothing. Budget just drains silently. What 404Watcher does: 1. Connects to your Meta Ad Accounts via official read-only Graph API 2. Scans every active ad URL every 2–24 hours automatically 3. Sends instant email alerts the moment a 404 or 503 is detected Works across 1 account or 200+ (built for agencies). Zero setup friction. Connect with Facebook Login, done in under 2 minutes. No developer needed. Starting at €0.99/mo which is cheaper than one wasted click. 🎁 PH exclusive: Use code PRODUCTHUNT at checkout for your first month completely free! Valid until 31 May 2026! Happy to answer any questions about the tech, the Meta API integration, or the problem itself. 🙏

404Watcher

Stop paying for clicks that land on broken 404 pages.

Stop paying for clicks that land on broken 404 pages.