# Coffee Mug GPT > Coffee Mug GPT makes one-off ceramic mugs from site-generated or customer-uploaded artwork. The public machine interface is read-only. It can list exact mug variants, prices, print dimensions, upload limits, and stable variant URLs. It cannot upload artwork, create a design, start checkout, charge a payment method, or place an order. ## Machine-readable resources - [Product catalog](https://coffeemuggpt.com/api/products): Exact variants, artwork requirements, prices, and current orderability. - [OpenAPI document](https://coffeemuggpt.com/openapi.json): Schema for the read-only product catalog operation. - [Agent guide](https://coffeemuggpt.com/agents): Supported workflow and safety boundary. ## Store policies - [Shipping](https://coffeemuggpt.com/shipping) - [Returns](https://coffeemuggpt.com/returns) - [Privacy](https://coffeemuggpt.com/privacy) - [Terms](https://coffeemuggpt.com/terms) ## Required purchase boundary Use the website for artwork, proof review, and hosted checkout. Show the selected variant, artwork proof, delivery details, and final amount to the user. Get explicit user approval before any purchase action. No machine purchase endpoint is available today.