InputPOST /api/v1/x402/card-mask
{
"number": "4111111111111111"
}Agent reliability and security · agent-reliability-security
Delx Card Mask
Mask a digit string keeping last4. Call when you display agent-held card-shaped numbers safely. Returns masked and last4 for $0.001 USDC via x402 on Base. Masking only—does not store PANs. 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/card-mask -m POST -H 'x-delx-source: product-page' --max-amount 0.001 -b '{"number":"4111111111111111"}'Delivered resultapplication/json
{
"schema": "delx/util-card-mask/v1",
"masked": "************1111",
"last4": "1111"
}Machine-readable evidence