I'd recommend you to do your own research and learn how to setup your own system and do the coding using the programming language of your choice.
That's a good question. VCES service provides two APIs. The Visa Card Eligibility API could be used by partners who have access to the cardnumber as part of the usecase. Partners who do not have access to the cardnumber could use the Visa Card Eligibility iFrame API to check for eligibility.
You can check out the Code Explorer on the VCES API Reference page here - https://developer.visa.com/capabilities/vces/reference
Yes, you can refer that PAN number to be referred to as a card number.