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Credit Card Number Validator (Luhn + Brand + IIN)
x402
Credit Card Number Validator (Luhn + Brand + IIN) is a paid API for AI agents from bank-validators.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).
Validates a test credit card number via Luhn checksum, identifies the card brand (Visa, Mastercard, Amex, etc.) from IIN ranges, and checks length validity — returning masked output only.
Price / call$0.02
Success—
StatusUnknown
How this service works
Luhn check plus card brand and length from IIN ranges (Visa, Mastercard, Amex...). Test numbers only; output is masked.
Output
Returns a JSON object with: luhnValid (boolean), brand name (e.g. 'Visa'), typicalLengths array for the brand, lengthMatchesBrand (boolean), masked card string, verdict summary, whether it is a published test number, the IIN source, a disclaimer, and any degraded/not-checked flags.
Example use cases
E-commerce checkout form validation
“Before we submit the order, can you check if 5500005555555559 passes the Luhn check and confirm what card brand it is and whether the number length matches?”
Test suite card number verification
“I'm building a payments integration and need to confirm that 378282246310005 is a valid Amex test number — does it pass the Luhn check and is the digit count right for Amex?”
Fraud-prevention training data labeling
“Run a quick Luhn and brand check on 6011111111111117 and tell me the verdict — is it a valid Discover card format and is it a known published test number?”
Technical details
Endpoint
GEThttps://bank-validators.x402tookit.com/card-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to validate the structural integrity of a credit/debit card number during testing or development — specifically when you want Luhn checksum, brand identification from IIN ranges, and length validation in a single call. Prefer it over generic Luhn libraries when brand-level IIN classification and masked output are required. Not suitable for real card numbers or live card authentication.
Side effects
- Missing 'number' query parameter returns an error
- Real card numbers rejected or flagged — endpoint is for test numbers only
- Unknown IIN prefix returns null brand and null length data
- Non-numeric input or malformed string may return validation failure
- Upstream IIN registry degraded returns degraded:true with partial results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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