Validate Mastercard in 2 seconds
Validate Mastercard numbers — Luhn checksum, 16-digit length, BIN range check. Format-only.
GET /card — live demo
Input mastercard
Sample value. Replace with your own.
Validation result
// Click "Validate →" to run
Ready. Free 50 validations/day.
How it works
Credit card numbers follow the Luhn algorithm and brand-specific lengths. Our validator detects the brand from BIN range, checks length and runs Luhn. It does not verify if the card is active or has funds.
API call
# GET
curl "https://finance-validators.boring-saas-infra.workers.dev/card?value=5555555555554444"
# POST (same result)
curl -X POST https://finance-validators.boring-saas-infra.workers.dev/validate \
-H "Content-Type: application/json" \
-d '{"type":"card","value":"5555555555554444"}'
What you get back
{
"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."
}
Why use our mastercard validator
- Instant — ~50ms response time from Cloudflare edge.
- Format + checksum + country rules (where applicable).
- REST API. Works from any language.
- Free 50/day. Pro: 5,000/month for $19.99.
- No API key needed for the free tier.
Pricing
$19.99/month
- 5,000 validations / month
- Batch validation
- VIES lookup (VAT)
- Priority queue
FAQ
How do I validate a mastercard?
GET /card?value=YOUR_VALUE or POST to /validate with {"type":"card","value":"..."}.
Is there a free tier?
Yes. 50 validations per day, no credit card required.
What does the validator check?
Format, length, country rules, and checksum where applicable.
Can I integrate this via API?
Yes. REST API. GET or POST. Works from any language.
Does it check if a real account exists?
No. Format + checksum only. It does not verify existence or activity.