#oonecho2001-3ds
warm dust
Zen Cart is an online management system used for online store. It's php based.
novel fiber
I see! and are you a developer of that system?
ultimately if you want to accept 3D Secure you need to use our PaymentIntent or Checkout APIs, as documented at https://stripe.com/docs/payments/accept-a-payment . Whomever maintains that system would have to put in some work to support those integrations