UCP Checker
Check a store

add-to-cart

Add a product to cart on any UCP-enabled Shopify store and get a checkout URL. Requires a variant ID from the search-catalog or get-product-details results. Returns the cart contents, checkout URL, and a cart_id token. To build multi-item carts: pass the returned cart_id back on subsequent calls. The agent holds the cart_id — no server-side session needed. Example: domain: "allbirds.com", variantId: "gid://shopify/ProductVariant/12345" Multi-item: domain: "allbirds.com", variantId: "...", cartId: "gid://shopify/Cart/abc123"

4verified stores declare the add-to-cart 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
2026-08-2550%
2026-04-0850%

Examples

4 of 4, highest UCP Score first
eshop.andyhoang.me Custom or not identified · 2026-04-08 oxid7-75-vlzx3djj.patsy-dev.payone-office.de Custom or not identified · 2026-08-25 webside.gr Custom or not identified · 2026-08-25 grayporter.com Custom or not identified · 2026-04-08

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

Input schema

inputSchema
{
    "type": "object",
    "required": [
        "domain",
        "variantId"
    ],
    "properties": {
        "cartId": {
            "type": "string",
            "description": "Cart token from a previous add-to-cart call. Pass this to add more items to an existing cart instead of creating a new one."
        },
        "domain": {
            "type": "string",
            "description": "The store domain (e.g., \"allbirds.com\")"
        },
        "country": {
            "type": "string",
            "description": "ISO country code for localized pricing/checkout (e.g., \"US\", \"GB\", \"CA\"). Optional."
        },
        "quantity": {
            "type": "integer",
            "description": "Quantity to add (default: 1)"
        },
        "variantId": {
            "type": "string",
            "description": "The product variant ID from search-catalog results (e.g., \"gid://shopify/ProductVariant/12345\")"
        }
    }
}

Explore protocol data