To make the checkout process smoother for your customers, you can create a unique URL that will take the customers directly to the cart with a single quantity of the product already present in it.
However, the process is a little tricky but still doable if you follow the steps properly.

How to create a cart permalink
A cart permalink refers to the unique URL that takes the customers directly to the checkout screen where the items have been pre-loaded in the cart. A permalink looks like this:
http://your-store.myshopify.com/cart/70881412:1,70881382:1
In this link, the 70881412 refers to the unique variant ID, while 1 is the product quantity that is pre-added to the cart. You can create a permalink for your store using the following format:
http://yourstore.com/cart/#{variant_id}:#{quantity}(,…)
How to add a discount to the cart permalink?
If you want to give your customers added incentives, you can directly put a discount on the cart permalink. Here’s the format for applying a discount:
/cart/{variant_id}:{quantity}?discount=test
In this format, the test refers to the string value for the discount code.
How to use a cart permalink?
You can use cart permalinks for creating a sales channel app for your store or share them directly with customers. Such links work best in cases where buyers purchase items from one merchant. Cart permalinks can be embedded in webpages as links or buttons, or shared through email campaigns, social media posts, and chat messages. You need a low integration effort to build this sales channel because:
- The app doesn’t have to process payments or make checkouts
- The app doesn’t have to handle disputes, sync orders, or deal with refunds
When creating a cart permalink, make sure that you’re adding a variant ID and not the product ID. For instance, the product ID shows a black t-shirt, while the variant ID refers to the medium-sized black t-shirt. Only the latter works when you’re creating a cart permalink.