Now, browser agents can read and update the checkout open in a shopper’s tab and submit the order once the buyer confirms it. When Idiscussed Shopify’s WebMCP rollout in August, its storefront tools allowed agents to search for products and manage the cart, then guide shoppers to checkout without placing the order. Shopify’sdeveloper changelogsays they “don’t expose a new API or require merchant configuration. ” What Agents Can Do At Checkout Eligible Shopify checkouts now register four WebMCP tools, according to the company’s Checkout WebMCP docs . update_checkoutchanges contact details, shipping or pickup, discount codes, payment, and extra fields such as a tax number.