def check_card(card_number, exp_month, exp_year, cvc): stripe.api_key = stolen_sk try: # Attempt to create a token (a $0 authorization) token = stripe.Token.create( card= "number": card_number, "exp_month": exp_month, "exp_year": exp_year, "cvc": cvc,

Criminals typically buy stolen card data in bulk—often called "dumps" or "fullz" (full information: name, address, card number, CVV, expiry). Most of this data is either expired, canceled by the bank, or has insufficient funds. A checker automates the process of filtering "live" cards from dead ones.

Stay educated, stay ethical, and build defenses—not exploits. If you believe your Stripe API key or any payment processing key has been stolen, rotate it immediately, contact your payment processor's security team, and review your transaction logs for suspicious $0 or $1 authorizations.