Payment failures can be individual, but they can also reveal a global checkout incident. A missing gateway, a blocked 3DS step, a validation error or a payment script conflict can prevent orders while the rest of the store keeps loading normally.
CashFlowCanary monitors payment-adjacent signals without collecting card data. The system looks for the checkout behavior that indicates the payment step is reachable and consistent, then raises evidence when the flow becomes abnormal.
The safe boundaries are important: no card storage, no public payment SDK added by the monitoring page, and no customer payload exposed in reports. The operational value comes from proof, not sensitive data. See the feature overview, compare plans, or request a free audit.
When the payment step fails, support needs to know whether this is a buyer-specific refusal or a store-wide break. Monitoring should help make that distinction quickly.