{"machine":"validate-credit-card","slot":"S63","title":"Credit card validator (Luhn)","how_to_call":"POST https://innernetcorp.com/machines/validate-credit-card with Content-Type: application/json","price_usd":"$0.003","currencies":["USDC","EURC"],"payment":"x402: send the POST without payment to receive a 402 with signed requirements; pay any option and retry.","input_example":{"number":"4532015112830366"},"input_schema":{"type":"object"},"summary":"Validate a card number with the Luhn checksum and detect the brand: Visa, Mastercard, Amex, Discover.","catalog":"/catalog"}