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UnionPay Card Luhn Validator
x402
UnionPay Card Luhn Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Validates whether a card number passes the Luhn checksum algorithm and matches the UnionPay card network pattern
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs whether a number passes Luhn and matches unionpay. Nothing is stored. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-card-unionpay first.
Output
Returns whether the submitted card number passes the Luhn checksum and whether it matches the UnionPay card network prefix/pattern, with no data retained after the check.
Example use cases
Pre-processing payment form validation
“Before I try to charge this card, can you verify that 6270948400000000 passes the Luhn checksum and actually belongs to the UnionPay network?”
Detecting card network in checkout flow
“I've got a card number entered by a user — 6221260123456780 — can you tell me if it's a real UnionPay card based on its format and checksum?”
Batch card cleanup for fraud screening
“We received this card number from a suspicious order: 6240008631401148 — can you validate whether it's a legitimate UnionPay card number that passes Luhn?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-card-unionpay?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a stateless, deterministic check of whether a card number is both Luhn-valid and a UnionPay card — no storage, no LLM inference, no side effects. Prefer the free sandbox POST /v1/sandbox/check-card-unionpay for testing; use this paid endpoint in production flows where you need reliable, low-latency card validation at $0.003 USDC per call.
Side effects
- Missing or empty card number input returns a validation error
- Card number exceeding 20 characters is rejected by schema
- Malformed request body returns a 400-level error
- Payment failure (insufficient USDC) returns 402 and the check is not performed
- Non-numeric characters in card number may cause unexpected validation results
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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