---
title: >-
  Headless checkout SSO is now documented with sso=silent - Shopify developer
  changelog
description: >-
  Shopify’s developer changelog documents all changes to Shopify’s platform.
  Find the latest news and learn about new platform opportunities.
source_url:
  html: >-
    https://shopify.dev/changelog/headless-checkout-sso-is-now-documented-with-ssosilent
  md: >-
    https://shopify.dev/changelog/headless-checkout-sso-is-now-documented-with-ssosilent.md
metadata:
  effectiveApiVersion: ''
  affectedApi:
    - displayName: Customer Account API
      handle: customer-account-graphql
    - displayName: Hydrogen
      handle: hydrogen
    - displayName: Storefront GraphQL API
      handle: storefront-graphql
  primaryTag:
    displayName: API
    handle: api
  secondaryTag:
    displayName: New
    handle: new
  indicatesActionRequired: false
  createdAt: '2026-05-21T15:00:45-04:00'
  postedAt: '2026-06-08T12:00:00-04:00'
  updatedAt: '2026-06-04T16:22:11-04:00'
  effectiveAt: '2026-05-22T12:00:00-04:00'
---

June 8, 2026

Tags:

* Customer Account API
* Hydrogen
* Storefront GraphQL API

# 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.

Learn more about [authenticating buyers in checkout](https://shopify.dev/docs/storefronts/headless/building-with-the-customer-account-api/checkout-authentication).