InputPOST /api/v1/x402/luhn-check
{
"number": "4111111111111111"
}Web and API intelligence · utility
Delx Luhn Check
Luhn checksum validation for digit strings for $0.001 USDC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.
One-command purchase
Run it from an agent.
No account or API key. AgentCash reads the 402 challenge, pays no more than the declared cap, retries the request and returns the result.
npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/luhn-check -m POST -H 'x-delx-source: product-page' --max-amount 0.001 -b '{"number":"4111111111111111"}'Delivered resultapplication/json
{
"tool_name": "util_luhn_check",
"result": {
"schema": "delx/luhn-check/v1",
"valid": true,
"length": 16,
"check_digit": "1",
"note": "Checksum only — does not validate card brand, issuer, or that a number is real. Never log full PANs in production systems.",
"redacted": "************1111"
}
}Example computed locally; this is not a paid delivery receipt.
Machine-readable evidence