UCP Checker

cart_update

Alias for update_cart (full replacement): sets the cart to exactly the provided line_items, creating a cart when no id is given.

Schema

Input Schema

{
    "type": "object",
    "properties": {
        "id": {
            "type": "string"
        },
        "items": {
            "type": "array",
            "items": {
                "type": "object"
            }
        },
        "line_items": {
            "type": "array",
            "items": {
                "type": "object",
                "required": [
                    "item",
                    "quantity"
                ],
                "properties": {
                    "item": {
                        "type": "object",
                        "required": [
                            "id"
                        ],
                        "properties": {
                            "id": {
                                "type": "string",
                                "description": "Product SKU."
                            }
                        }
                    },
                    "quantity": {
                        "type": "number"
                    }
                }
            }
        }
    }
}
Verified Stores
0

No verified stores expose this tool yet.

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Weekly UCP Report
Issue #53 · Oct 5, 2026
+664
new verified stores
Verified rate
Latest spec
Cart capability