web-mcp-mu.vercel.app
A WebMCP commerce demo where people and browser agents work from the same cart.
First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com
Answer 3 · Act 3 · Transact 1 · Score: Not yet scored
Tool inspector
add_to_cart
Add a live Shopify inventory item to the shopper's shared cart and update the visible cart immediately.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
item_id |
string | yes | The exact Shopify variant ID in the id field returned by search_inventory (it starts gid://shopify/ProductVariant/). |
quantity |
integer | yes | Number of units to add. |
Raw JSON schema
{
"type": "object",
"properties": {
"item_id": {
"type": "string",
"description": "The exact Shopify variant ID in the id field returned by search_inventory (it starts gid://shopify/ProductVariant/)."
},
"quantity": {
"type": "integer",
"minimum": 1,
"maximum": 20,
"description": "Number of units to add."
}
},
"required": [
"item_id",
"quantity"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}
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