Improved error handling for invalid Customers in Store-specific Carts | HTTP API

Improved error handling for invalid Customers in Store-specific Carts

9 July 2025

Composable Commerce

HTTP API

Resolved issue

Carts

When creating a Cart in a Store, if the referenced Customer (specified in CartDraft.customerId) does not exist, the Carts API now returns a 400 Bad Request error with the InvalidInput code. Previously, the API returned a 404 Not Found error in this scenario.

This change ensures the error response provides clearer feedback to developers and makes debugging easier.