UCP Checker

update_cart_item

Change a cart line's quantity.

1verified stores declare the update_cart_item tool
0%of the verified stores we check

Who declares it

verified stores we check
By store platform
Custom or not identified 100%
By release
2026-08-25100%

Examples

1 of 1, highest UCP Score first

Each store has its own status page. To find more, search the directory.

Input schema

inputSchema
{
    "type": "object",
    "required": [
        "cartId",
        "itemId",
        "quantity"
    ],
    "properties": {
        "cartId": {
            "type": "string"
        },
        "itemId": {
            "type": "integer",
            "description": "cart line id from the cart's items"
        },
        "quantity": {
            "type": "integer",
            "description": "new quantity, 1-999"
        }
    },
    "additionalProperties": false
}

Explore protocol data