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Mastercard Luhn Validator
x402
Mastercard Luhn Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-02).
Validates whether a card number passes the Luhn algorithm and matches the Mastercard card-number format
Price / call$0.008
Success—
StatusUnknown
How this service works
Call when an agent needs whether a number passes Luhn and matches mastercard. Nothing is stored. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/check-card-mastercard first.
Output
Returns a boolean or structured result indicating whether the supplied card number passes the Luhn mod-10 checksum and conforms to the Mastercard IIN/prefix and length format requirements. No card data is stored or logged.
Example use cases
Pre-checkout card number validation
“Before I submit this order, can you verify that the card number 5500005555555559 passes Luhn and is actually a Mastercard?”
Fraud screening card format check
“I have a card number from a new user signup — 5105105105105100 — can you check if it's a legitimate Mastercard format and passes the Luhn test?”
Payment form input sanity check
“The user typed in 5200828282828210 as their Mastercard number — can you validate it passes Luhn and matches the Mastercard card scheme before we proceed?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-card-mastercard?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to validate a card number specifically as a Mastercard (IIN prefix + length) AND verify its Luhn checksum in a single call, with no data retention. Prefer the free sandbox endpoint POST /v1/sandbox/check-card-mastercard for testing. Choose this over generic Luhn-only validators when Mastercard network identification matters.
Side effects
- Input card number string is empty or exceeds 20 characters — request rejected
- Card number contains non-numeric characters — validation may fail or return false
- Card number fails Luhn check — returns invalid result
- Card number passes Luhn but does not match Mastercard prefix/length — returns false for Mastercard match
- Payment of $0.008 USDC not provided — HTTP 402 response
- Malformed request body — 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
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