Can an AI agent buy from hardnheavy.style?

An outside agent can buy here.

Last checked: 2026-11-15T02:20:36.388584+00:00
Result: An outside agent reached a payable checkout
Protocol: ucp-mcp
Agent can pay alone: yes, after the buyer approves a one-time link
Payment options at checkout: shop_pay, shopify.card
Buyer must provide: buyer_identity_contact_method_required
Ships to (tested): DE, GB, JP, KR, US
No delivery to (tested): -
Agent shopping endpoint: https://backup-hardnheavy-store.myshopify.com/api/ucp/mcp

How an agent buys here

Connect: Universal Commerce Protocol over MCP (ucp-mcp version 2026-08-25) at store.endpoint_url.
Identify your agent: send the header UCP-Agent: profile="<https URL of your UCP agent profile>" (and the same profile in the tool call meta "ucp-agent").
Find the product: call search_catalog with your query and context {"address_country": "US", "currency": "USD"}.
Create a checkout: create_checkout with the variant id and quantity and the same context. The response shows the total, delivery options and any messages.
Before checkout completes, have from the buyer: buyer email or phone number.
Payment offered at checkout: Shop Pay: on the first purchase the buyer approves once at the store's continue_url and can link Shop Pay to the agent (identity linking); after that the agent can pay alone; card: the buyer enters card details on the store's checkout page (continue_url) for each purchase.
Pay only with the buyer's authorisation, under the store's terms. ONAA is not a party to the purchase, holds no funds and cannot pay for you.

Machine-readable: JSON · check history