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agent402.tools Card Validate
x402
agent402.tools Card Validate is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates a payment card number using the Luhn checksum algorithm and detects the card brand (e.g. Visa, Mastercard), without storing or logging the number.
Price / call$0.001
Success—
StatusUnknown
How this service works
Validate a payment card number (Luhn checksum) and detect the brand. Numbers are not stored or logged.
Output
Returns whether the card number passes the Luhn checksum (valid/invalid) and the detected card brand (e.g. Visa, Mastercard, Amex, Discover). No card data is stored or logged.
Example use cases
Example prompt
“Can you check whether the card number 4111 1111 1111 1111 is valid and tell me what brand it is?”
Technical details
Endpoint
POSThttps://agent402.tools/api/card-validateWhen to prefer
Use this endpoint when you need a quick, privacy-safe Luhn checksum validation and card brand detection for a single card number without retaining any sensitive data. Prefer this over full payment processors when you only need client-side-style validation logic server-side, without initiating a charge.
Side effects
- Missing or empty card number field returns an error
- Non-numeric input that cannot be interpreted as a card number
- Network or payment gateway failure returns a 402 or 5xx error
- Ambiguous or unrecognized card brand returns null/unknown brand
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| number | string | Card number (spaces/dashes allowed) |
Output
Schema · Response
{
"type": "json",
"example": {
"brand": "visa",
"valid": true,
"length": 16
}
}Tags
x402
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