demo.spreadfront.com
A live example store, generated entirely from a Google Sheet. Browse, add to cart, try the checkout - orders here are not fulfilled.
First seen 2026-09-07 · Last seen 2026-09-14 · Source: webmcp.com
Answer 4 · Act 3 · Transact 1 · Score: Not yet scored
Tool inspector
update_cart
Set the quantity of a cart line (0 removes it). Identify the line by product id and, when the product has options, the same options used to add it.
Page: /p/wireless-mouse
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
id |
string | yes | Product id of the cart line. |
quantity |
number | yes | New quantity; 0 removes the line. |
options |
object | no | The variant choices of the line to change, if it has any. |
Raw JSON schema
{
"type": "object",
"properties": {
"id": {
"type": "string",
"description": "Product id of the cart line."
},
"quantity": {
"type": "number",
"description": "New quantity; 0 removes the line."
},
"options": {
"type": "object",
"description": "The variant choices of the line to change, if it has any.",
"additionalProperties": {
"type": "string"
}
}
},
"required": [
"id",
"quantity"
]
}
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