Credit Card

POST/v0/credit-card

Validates credit card numbers using the Luhn algorithm. Accepts cards from Visa, Mastercard, American Express, Discover, JCB, Diners Club, and UnionPay. The card number is sent in the request body to avoid logging sensitive data in server access logs.

Guides: Node.js · Python

Request Body

{
  "number": "4111111111111111"
}

Example Request

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.isvalid.dev/v0/credit-card"

Response Fields

Field	Type	Description
valid	boolean	Whether the card number is valid
network	string	Detected card network (e.g. Visa, Mastercard, Amex)
length	number	Number of digits in the card number
luhn	boolean	Whether the number passes the Luhn checksum

Example Response

{
  "valid": true,
  "network": "Visa",
  "length": 16,
  "luhn": true
}