This article is meant to serve as a collection of ideas to help with your integration design. It will grow over time. As always, please reach out to us if you have any questions.
You can build a custom storefront elsewhere, create a cart using the API, and when your customer is ready to checkout, your custom storefront can redirect them to your VineSpring hosted storefront using
https://<your VS hosted storefront>/#/auth/<customer's auth token>/cart%2F<cart id>.