InputPOST /api/v1/x402/luhn-valid
{
"number": "4111111111111111"
}Agent reliability and security · agent-reliability-security
Delx Luhn Valid
Luhn check for digit strings (cards/IDs). Call when you reject obviously invalid card-shaped numbers before payment UI. Returns valid boolean and digit count for $0.001 USDC via x402 on Base. Checksum only—not issuer, funds, or PAN storage. No network, no keys, no retention. Results are advisory; the caller owns budgets, auth, and production controls.
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-valid -m POST -H 'x-delx-source: product-page' --max-amount 0.001 -b '{"number":"4111111111111111"}'Delivered resultapplication/json
{
"schema": "delx/util-luhn-valid/v1",
"valid": true,
"digits": 16
}Machine-readable evidence