drinkhappyviking.com WebMCP Tools, Schemas & Agent Capabilities

drinkhappyviking.com

live Unverified (seed import) Commerce 11 tools imperative implementation

Happy Viking plant-based protein shakes deliver 30g protein, 10g fiber, probiotics, and superfoods for fast, filling, complete daily nutrition. Shop Now.

First seen 2026-09-28 · Last seen 2026-09-28 · Source: webmcp.com

Answer 4 · Act 7 · Transact 0 · Score: Not yet scored

Tool inspector

update_cart_lines

act imperative

Change the quantity of items already in the cart, or remove them. Every change here addresses an existing cart line by its id, so call get_cart first unless you already have line_items[].id from an earlier get_cart in this conversation. Pass the ABSOLUTE target quantity, not a delta — quantity 2 means the line ends up at 2 regardless of what it was. Use quantity 0 to remove the line entirely. Batch every change for ONE request into a SINGLE call — line_items accepts up to 10 entries; do NOT call update_cart_lines once per line. Batching applies WITHIN a single request: each new thing the user asks for later is its own call. This tool cannot add new merchandise. To add something not already in the cart, use add_to_cart. To empty the whole cart at once, use cancel_cart.

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Input schema

Property	Type	Required	Description
`cart`	object	yes	—

Raw JSON schema

{
  "type": "object",
  "required": [
    "cart"
  ],
  "properties": {
    "cart": {
      "type": "object",
      "required": [
        "line_items"
      ],
      "properties": {
        "line_items": {
          "type": "array",
          "description": "Existing cart lines to update or remove (1-10).",
          "minItems": 1,
          "maxItems": 10,
          "items": {
            "type": "object",
            "required": [
              "id",
              "quantity"
            ],
            "properties": {
              "id": {
                "type": "string",
                "description": "Existing cart line id from get_cart line_items[].id. Required — this tool cannot resolve products by name."
              },
              "quantity": {
                "type": "integer",
                "description": "Absolute target quantity for this line (not a delta). 0 removes the line.",
                "minimum": 0
              }
            }
          }
        }
      }
    }
  }
}