Improved concurrency handling in the Cart AJAX API and Storefront Cart GraphQL API
UpdateUnverifiedAdded Sep 24, 2026
As of October 10, 2025, the Cart AJAX API and Storefront Cart GQL API now processes simultaneous requests. For example, when sending two cart add requests at the same time, the Cart AJAX API executes both requests. Previously, the Cart AJAX and GraphQL APIs were inconsistent in handling concurrent requests. This sometimes resulted in requests being dropped.
Topics: Developer tools
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