How can i verify mastercard and visa card in my shopping cart project?

Question

• My team working in a shopping cart project
• We have integrated First data payment Gateway
• Now we want to verify the master card and visa
• I need to authenticate the master card SecureCode based on the link given below
• http://www.mastercard.com/us/personal/en/cardholderservices/securecode/how_it_works.html
• Please provide any api or necessary information for doing the same

Answer 1

Hum, imho you need a payment provider to use credit card payment anyway - they'll give you a kind of api to check the data against.

Answer 2

To validate a credit card is legitimate:

1. Verify it against the Luhn Algorithm. (Will only validate the card number is in a valid format)
2. Verify the card number against known Issuer Identification Numbers
3. Perform an Authorization Only (aka AUTH ONLY) for $0.00 (or $0.01 if your processor does not support zero auths). This is the only guaranteed way to verify a credit card exists.

Answer 3

To at least validate the code is valid you can give this a try: http://www.notesbit.com/index.php/web-mysql/web-scripts/luhn-algorithm-in-c/