Validate Payment Card API

What it does

Card Number Validator checks whether a payment card number is structurally valid, identifies the card network, and returns a masked representation for safer handling.

Send a card_number in the request body. The value can include spaces or dashes; those are ignored during validation. The response includes valid, luhn_valid, and length_valid so you can see whether the number passes the checksum and length checks. You also get network, iin, length, last4, formatted, and masked when they can be derived, plus an optional note for additional context.

Use Card Number Validator when you need to clean up user-entered payment data before storing it, flag obvious typos in checkout forms, or label card numbers by network in admin and support workflows. The masked and last-four outputs are useful when you want to display or log card details without exposing the full number.

This service is for validation and normalization only. It does not perform authorization, issuer lookup, or account verification.