Lena's listings become a public counter: a page for people, a JSON card and an MCP server for agents. Agents get facts only — size, paint, stock, delivery — never guesses.
Any AI agent can now
buy at her shop.
Lena builds each 1:43 car by hand in her spare room. Open Counter makes her shop readable and payable for anyone's AI shopping agent — and every order still needs a human's yes in PayPal.

buyer in Denver · by next Fri
Talk to her sales agent.
Lena's own sales agent (NVIDIA Nemotron), using the same nine tools any outside agent gets over MCP. Ask in English or Russian: a car from the shelf, or one made to order. It prepares the PayPal checkout; only you can pay. Lena reads every chat and teaches it.
Sandbox buyer for the PayPal window: sb-yi0xc53507798@personal.example.com · password 2dt_AD6W · PayPal's test environment, no real money moves
Each car built by hand.
Resin bodies, photo-etched brass trim, paint mixed by hand. Every listing is written once and read two ways: by people, and by agents.
How one is made 24 to 30 hours each, by hand
Lena and her bench are an AI-generated illustration of the work; the shop and the counter are real, and the payments are real PayPal sandbox payments.
Shoppers ask their AI. Small makers aren't in the answer.
PayPal's agentic checkout (Store Sync, Agent Ready) is request-access and built around platform stores (PayPal developer docs). Open Counter gives a one-person shop the same reach with what any PayPal account already has.
Legible. Payable. Still hers.
Any agent can start a PayPal order (Orders v2) priced on our server, line by line, with the buyer's address. Made-to-order builds get a PayPal invoice: half now, the rest before shipping.
Nothing is charged until a human approves in PayPal. Her rules hold in code: US shipping only, any quantity up to the stock shown, made-to-order prices and build times from her table, stock checked again at capture.
Point any agent here.
Tools: about_counter search_counter item_details delivery_estimate start_checkout quote_commission start_commission_checkout leave_contact order_status
Lena is one maker. There are millions like her.
One photo and one sentence, and your shop is readable by every AI shopping agent. The AI writes the words; you set the price.
Open your counter →