Add To Cart outside shopify

Retired Boards Appdev Custom Storefronts

AI-generated summary

Adding products to a Shopify cart from an external platform was the main issue. The setup described is a custom storefront that lists Shopify products via the Shopify API, while checkout and payment should still happen on Shopify.

Key point raised:

  • Directly adding items to a Shopify cart from outside the Shopify store/domain is not supported.
  • The cart flow can only be handled through Shopify’s Ajax API, which must run within the store’s own theme/domain.

Practical implication:

  • A separate external site can display the same products, variants, and collections, but it cannot create or manage a native Shopify cart remotely in the way requested.
  • Users would need to be brought onto the Shopify storefront/domain for cart functionality before proceeding to checkout.

Outcome:

  • The discussion gives a clear limitation rather than a workaround.
  • No alternative solution was confirmed in the thread; the request remains effectively blocked by platform constraints.
1

Hi,

I want to add a product to a Shopify cart from outside Shopify.

My scenario is as follows -

→ I have listed products from Shopify API outside the Shopify (On another platform created my own)

→ Now I want help in how I will add those products in “Shopify Cart” from outside Shopify (another platform) and then the user can checkout and do the payment at Shopify end only.

(The other / my platform will not have a different product/variant/collection than my Shopify account)

Shortly - I want to add the product to the user’s cart by the users outside Shopify and then the user can checkout and done payment at Shopify end only.

2

This isn’t possible from outside the App, only via the ajax API which has to be done within the store theme/domain.

See this thread for more details: https://community.shopify.com/c/Shopify-APIs-SDKs/REST-Admin-API-gt-Cart/td-p/517135