Yes it is a bit awkward going thru the checkout process in the chat. MCP-UI returns the cart UI so you can interact with the cart directly like change quantity or change shipping method. You can also paste in your address and the chat LLM will figure out how to handle the address submission for that specific site.

Also, we bring in the PayPal and Stripe Elements directly into the chat so you can enter your credit card info. Just like entering it on that merchants website.