UCP Checker

set_cart_user

Set or update the user ID on a cart, linking it to a customer account. Returns the updated cart.

Schema

Input Schema

{
    "type": "object",
    "required": [
        "cartId",
        "userId"
    ],
    "properties": {
        "cartId": {
            "type": "string",
            "description": "the base62 cart id"
        },
        "userId": {
            "type": "string",
            "description": "the user/customer id"
        }
    }
}
Verified Stores
0

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Weekly UCP Report
Issue #51 · Sep 21, 2026
+664
new verified stores
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Cart capability