Task

Payment Card Validation

1 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

Validate a card number x402 REST usage

Validate a payment-card number: Luhn check-digit test plus network detection and length check. A syntactically valid number that fails Luhn returns `valid:false` (a 200, not an error).

creditcard.openverbs.com Crypto & Payments 2 calls / 30d checked 2026-10-26

0.002 USDC per call per call

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