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Luhn Algorithm Validator
x402
Luhn Algorithm Validator is a paid API for AI agents from dt0ur.online, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Validates a numeric string (credit card number or IMEI) against the Luhn checksum algorithm to determine if it is structurally valid.
Price / call$0.01
Success—
StatusUnknown
How this service works
Validates a credit card or IMEI number against the Luhn checksum algorithm.
Output
Returns a pass/fail result indicating whether the provided numeric string satisfies the Luhn (mod-10) checksum algorithm, confirming the number is structurally valid (not necessarily active or real, just correctly formed).
Example use cases
Pre-charge card number sanity check
“Before I try to charge this card, can you run a Luhn check on 4111 1111 1111 1111 to make sure the number is at least structurally valid?”
IMEI validity check for device onboarding
“I'm registering a new device with IMEI 490154203237518 — can you validate that number against the Luhn algorithm before I add it to the system?”
User input validation in payment form
“A customer just entered the card number 1234-5678-9012-3456 — does it pass the Luhn checksum, or should I prompt them to re-enter it?”
Technical details
Endpoint
POSThttps://dt0ur.online/api/utility/luhn-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap, offline-style structural check of a credit card or IMEI number before hitting a live payment network or carrier API. It is ideal for pre-validating user input in forms, filtering out obviously invalid numbers early in a pipeline, or verifying IMEI numbers during device registration workflows. Prefer this over full payment authorization when you only need to confirm the number is well-formed, not that it is active or funded.
Side effects
- Non-numeric input or unsupported characters may cause a validation error
- Empty string or missing 'number' field returns an error response
- Extremely short or malformed strings may return invalid without a checksum computation
- Network timeout if the service is unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| number | string | Numeric string (spaces/dashes allowed) |
Tags
x402
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