# [Cart AJAX API] Inventory error message updates — Shopify developer changelog
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## [Cart AJAX API] Inventory error message updates

We are updating the error messages in the AJAX API for cases where a client requests more inventory than is available.

* If no inventory of a variant is in the cart and the client requests more than is available, the error message will be: "Only *available quantity* items were added to your cart."
* If all available inventory of a variant is already in the cart and the client requests more, the error message will be: "The maximum quantity of this item is already in your cart."

These changes will affect the `add.js`, `change.js`, and `update.js` endpoints.

*Published: March 04, 2025*
Tags: API, New
Link: https://shopify.dev/changelog/cart-ajax-api-inventory-error-message-updates

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