Headless checkout SSO is now documented with sso=silent

We’ve updated our headless checkout authentication docs to refer to the silent single sign-on query parameter as sso=silent instead of logged_in=true.

This is a terminology and documentation update only. Existing checkout URLs that use logged_in=true will continue to work. Going forward, Shopify docs and examples will use sso=silent when describing the silent SSO flow from a headless storefront to checkout.

Use sso=silent when you want checkout to verify the buyer’s active session on the customer accounts domain through an OIDC-compliant flow. For most headless storefronts using the Customer Account API, we continue to recommend continuous cart authentication by setting the cart’s customerAccessToken and redirecting buyers to the cart’s checkoutUrl.

Learn more about authenticating buyers in checkout.