When the Add to Cart button vanishes, your listing stays live in search — and your PPC keeps running. SentryKit detects the suppression with the cause, so you can pause campaigns and fix it before the waste compounds.
SentryKit monitors purchase button availability across every tracked ASIN. The moment the Add to Cart button is suppressed, an alert fires — with the ASIN, the suppression cause, and the timestamp. A second alert confirms when the button is restored so you know exactly when campaigns can safely resume.
The Add to Cart button is the purchase mechanism on every Amazon product page. When it disappears, your listing doesn't — and that's the problem. Buyers click through from search, from your ads, from external links, and land on a page that offers them no way to purchase. The listing looks normal. Search ranking stays intact. Traffic data looks fine. The only number that collapses is conversions.
For sellers running PPC, this is the worst possible combination. Your ads keep displaying, buyers keep clicking, and every click charges your advertising budget with zero chance of a return. The loss doesn't just sit there — it compounds for every hour the button stays down and every campaign that keeps running against it.
Amazon doesn't notify you. Seller Central doesn't flag it on your dashboard. The first time most sellers discover the issue is when they run a conversion report and find a gap they can't explain — by which point the waste has already accumulated. SentryKit closes that gap at the source.
SentryKit alerts you the moment the button disappears. These are the steps sellers take to stop the waste and restore purchase availability.
For most sellers, the alternative to SentryKit is a manual check or a confusing conversion anomaly in a weekly report.
| Capability | SentryKit | Manual / No Monitoring |
|---|---|---|
| Detection speed | Near real-time | Hours or days — via conversion anomaly |
| PPC pause trigger | Immediate alert — pause before waste accumulates | No trigger — campaigns keep running |
| Suppression cause included | Yes — with fix direction | No — manual investigation required |
| Restoration confirmed | Yes — separate confirmation alert | No — you guess based on a page refresh |
| Monitoring hours | 24/7 including nights and weekends | When you're online and thinking to check |
| ASINs covered | Every tracked ASIN, automatically | One at a time, manually |
| Event history | Full timestamped log | Nothing retained |
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