Detect card-testing automation in web checkout
Automated card testing can repeat payment attempts through a valid checkout flow. Bot evidence adds context before the payment provider makes its own fraud decision.
Request a site auditCheckout can become a card-validation endpoint
A carding bot repeats small authorization attempts and records which cards clear. Rotating network and browser details can make each request look unrelated even when the workflow is automated.
Read the researchWhat the traffic looks like
Repeated authorization attempts
Card-testing workflows can submit many payment details and record how the checkout or payment provider responds.
One script, one card list
A list of stolen card numbers gets run through checkout automatically until the valid ones are found.
A browser that passes the obvious checks
Headless or modified browsers can resemble an ordinary checkout session, so one browser flag or viewport check is weak evidence.
What runs against this traffic
Automation evidence at checkout
In supported web checkouts, Centinel evaluates browser and request evidence around the payment flow.
The checkout can treat a suspicious automated attempt differently from an ordinary session. Centinel does not decide whether a card or transaction is fraudulent.
Read more: Automation evidence at checkoutA route-specific response
The checkout policy can use the available automation decision before the request reaches downstream payment handling.
Teams can limit repeated testing while keeping the response separate from the payment provider's fraud decision.
Read more: A route-specific response
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