Customer Account API removes lastIncompleteCheckout and Checkout types in 2026-10
Customer Account API 2026-10 removes Customer.lastIncompleteCheckout and the Checkout type subtree. Shopify directs affected integrations to Storefront API cart flows and Customer.orders.
Read the official Shopify source01 · Source fact
What changed
Customer Account API 2026-10 removes Customer.lastIncompleteCheckout and the Checkout type subtree. Shopify directs affected integrations to Storefront API cart flows and Customer.orders.
- Published
- Jul 6, 2026
- Effective
- API version 2026-10
- Deadline
- API version 2026-10
02 · Business impact
Who and what may be affected
- Operators
- Agency
- Surfaces
- Customer Account Api, Storefront Cart
- Impact
- Technical, Operations
- Settlement categories
- No direct payout category identified
03 · Next action
What to check
Before adopting Customer Account API 2026-10, remove affected queries and migrate checkout-state workflows to supported cart or order flows.
confirmed source relationshipLast reviewed Jul 13, 2026