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Keyronne Payment Card Validator
x402
Keyronne Payment Card Validator is a paid API for AI agents from keyronne.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Validates payment card numbers via Luhn checksum and detects the card network (Visa, Mastercard, Amex, Discover, etc.) with per-network length rules, returning network name, Luhn result, and last four digits.
Price / call$0.001
Success—
StatusUnknown
How this service works
Validate payment card numbers: Luhn checksum plus network detection (Visa, Mastercard, Amex, Discover, Diners, JCB, UnionPay, Maestro) with per-network length rules. Returns the network, Luhn result, and last four digits. Structure only — never that the card exists or has funds. No card data is stored or logged. POST a JSON body like: {"card":"4111 1111 1111 1111"}
Output
Returns the detected card network (Visa, Mastercard, Amex, Discover, Diners, JCB, UnionPay, Maestro), the Luhn checksum pass/fail result, and the last four digits of the card. Does not confirm card existence, funds, or active status. No card data is stored.
Example use cases
Example prompt
“Can you check if the card number 4111 1111 1111 1111 is structurally valid and tell me what network it belongs to?”
Technical details
Endpoint
POSThttps://keyronne.com/api/cardWhen to prefer
Use this endpoint when you need to structurally validate a payment card number client-side or server-side before submission, detect the card network from the number, or batch-validate up to 50 card numbers at once. Prefer this over manual Luhn implementations when you need network detection alongside checksum validation. Note: this confirms structural validity only, not whether a card account is active or has funds.
Side effects
- Card number fails Luhn check — returns Luhn failure with detected network if determinable
- Unrecognized card prefix — network returned as unknown
- Card length does not match network rules — flagged as invalid length
- Invalid input format (non-numeric after stripping spaces/dashes) — returns parsing error
- Batch exceeds 50 cards — request rejected
- Missing card field in request body — returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| card | string | One card number; spaces and dashes ignored. |
| cards | array | Batch of card numbers. |
Tags
x402
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