The SalesChannel-API is part of our API family. It allows access to all sales channel operations, such as creating new customers, customer login and logout, various cart operations and a lot more.
It's ideal if you want to build your own storefront. You could create a mobile app based on the Sales Channel API or just embed it into your existing application to have a solid base for payment and transaction handling.
The Storefront API does only require the client_id, which you can find in the Administration -> Sales Channel. The client_id is used to identify which Sales Channel should be used. You find more information about the concept behind the Sales Channel here.
The Storefront API has no authentication since it is designed to be a public API. Some user related endpoints require a logged in user.
The access key which you have generated above must always be included in your API request. The custom header sw-access-key is used for this purpose.
The Storefront API supports a simple JSON formatted response similar to the Shopware 5 API.