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Delx Commerce Luhn Validation API
x402
Delx Commerce Luhn Validation API is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Validates whether a numeric string passes the Luhn algorithm checksum, returning validity status and digit count
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
A JSON object containing a boolean `valid` field indicating whether the number passes the Luhn algorithm, a `digits` integer with the count of digits in the input, and a `schema` string identifier (e.g. 'delx/util-luhn-valid/v1') for response versioning.
Example use cases
Pre-flight credit card format check
“Before I send this card number 4111111111111111 to the payment processor, can you verify it passes the Luhn checksum so I know it's not a typo?”
User input validation in checkout flow
“A user just entered card number 1234567890123456 in our checkout form — does it pass Luhn validation, and how many digits does it have?”
Sanitizing scraped card-like data
“I've got a list of numeric strings scraped from a form and I want to filter out the ones that fail the Luhn check — can you start by validating 79927398713?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/luhn-valid?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap ($0.001 USDC), no-signup Luhn checksum check for a single numeric string and want verifiable, pay-per-result delivery over Base or Solana via x402 — ideal for AI agents that need inline card validation without integrating a full payment SDK or standing up their own Luhn logic.
Side effects
- Non-numeric input or strings with spaces/dashes may fail or return invalid
- Empty string input likely returns an error or false validity
- Very short numbers (fewer than 2 digits) may not conform to standard Luhn expectations
- Network or payment authentication failures (x402 payment not accepted) block the call entirely
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| number | string | Input field: number. |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"digits": 16,
"schema": "delx/util-luhn-valid/v1"
}
}Tags
x402
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