Validate IBAN, VAT, SWIFT, LEI, and credit cards instantly. Free 50/day. Now with a landing page and 100 SEO validator pages.
How to pay
Pick whichever fits your workflow — you can switch any time.
Subscribe
$19/month
Predictable monthly cost with included usage. Best for steady, high-volume traffic.
- Unlimited tools within plan limits
- One API key, billed once a month
- Cancel any time
Pay-per-call
$0.01 – $0.02 per call
Charge agents in USDC the moment they call a tool. No subscriptions, no signup — pay only for what you use.
- 2 priced tools available
- Settled in USDC on Base
- No account or API key required
Validate credit card numbers instantly. Luhn checksum + brand detection from BIN range. Supports Visa, Mastercard, Amex, Discover, JCB, Diners Club, Maestro, UnionPay.
Tools:
- validate_card — validate a single card
- validate_card_batch — up to 50 cards in one call
Example
Input: 4111111111111111
Output: { "valid": true, "card_number": "4111111111111111", "brand": "visa", "luhn_ok": true, "length_ok": true, "last4": "1111", "length": 16, "note": "Format-only check. Does not verify if card is active." }
Links
- Landing + live demo: https://boring-saas-infra.pages.dev/finance-tools
- Card validator page: https://boring-saas-infra.pages.dev/validate/validate-card
- 15 brand pages: https://boring-saas-infra.pages.dev/validate/ (Visa, Mastercard, Amex, Discover, JCB, Diners, Maestro, UnionPay, and more)
- Pricing: Free 50/day · Pro $19.99/mo -> https://checkout.suby.fi/p/pro_v1vsrhgd50oz4f0g266g33am
Notes
- Format-only check. Does not verify if card is active or has funds.
- Never log or store real card numbers.
- REST endpoint: https://finance-validators.boring-saas-infra.workers.dev/card