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SignalDesk AI Luhn Check
x402
SignalDesk AI Luhn Check is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).
Validates whether a numeric string passes the Luhn checksum algorithm, returning a boolean validity result
Price / call$0.001
Success—
StatusUnknown
How this service works
Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.
Output
Returns a JSON object with 'valid_checksum' (boolean indicating whether the number passes the Luhn mod-10 algorithm) and 'account_verified' (boolean, typically false as this is a format check only, not a live account lookup)
Example use cases
Pre-processing card number validation
“Before I submit this card number '4111111111111111' to a payment form, can you check if it at least passes the Luhn checksum so I know the format is correct?”
Validating generated test card numbers
“I generated a test card number '4539578763621486' for my sandbox environment — can you run a Luhn check on it to confirm it's structurally valid before I use it?”
Checking account identifier integrity
“I have this account identifier '79927398713' and I want to verify it passes the Luhn algorithm — can you do a quick checksum validation on it?”
Technical details
Endpoint
POSThttps://x402-agent.kariguetoazul.workers.dev/api/network/luhn-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap ($0.001 USDC) server-side Luhn checksum validation on a numeric string — especially when you want an authoritative computation rather than a client-side implementation. Best for validating test or synthetic card numbers before using them in workflows, or verifying identifier integrity. Do not use for live account lookups or real payment credential validation.
Side effects
- Input number contains non-numeric characters causing validation error
- Number exceeds maxLength of 64 characters
- Missing 'number' field in request body
- Real payment credentials submitted (against usage policy — endpoint is for sample/test numbers only)
- Network timeout from Cloudflare Worker under load
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| number | string | Sample checksum number; do not send real payment credentials. |
Output
Schema · Response
{
"type": "json",
"example": {
"valid_checksum": true,
"account_verified": false
}
}Tags
x402
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