Hi @cansin
Apologies for the confusion. The Storefront API docs are going to be updated to reflect the scenario you are facing. A sales channel is built generally as a 1:many relationship and would be a public app as you’ve mentioned. For a single store web checkout the process is different. The webUrl is the suggested solution for anyone building a web experience. This is because redirecting to the web checkout will not interrupt the flow and provides our PCI compliance, accelerated checkout, and other perks of the hosted checkout. https://shopify.dev/tutorials/create-a-checkout-with-storefront-api#shopify-web-checkout