Autonomous buying
How an Autonomous Buyer Shops a Category
People stop looking when an option is good enough. Herbert Simon called it satisficing, and a century of retail was built on it: the eye-level shelf, the sponsored slot, the tab you do not open. An autonomous buyer that shops like a tired person is just a more expensive ad click. The find loop has to be willing to look at option fourteen hundred with the same attention as option one.
Three ways a brief arrives
On this product the brief is deliberately small. You type a need, you paste a product link, or you upload a photo. Each one is a different find problem and the same buy rule.
- Typed intent is underspecified on purpose. “Nike, size 10, under eighty” names a category, a constraint, and a ceiling. The agent still has to decide what counts as the same shoe.
- A link is overspecified. The page is a claim by one merchant. The agent’s job is to ask whether that claim is the best available instance, not to worship the URL.
- A photo is a recognition problem before it is a commerce problem. The label on the image is not a mandate. It is a guess the person can correct before anyone is paid.
Score the landed cost, not the hero price
The number on the picture is rarely the number that leaves the account. A serious find loop adds tax, shipping, duty if it applies, and the cost of a return that is not actually free. It subtracts a reward only if that reward is real money, not a point the program can devalue. It throws out offers that miss a hard constraint: the size, the delivery date, the material the person named. Sponsored rank is not a feature in this score. It is the thing the score exists to ignore.
Price dispersion on identical goods is mostly a search-cost story, the one George Stigler told in 1961. When polling another merchant is cheap, the dispersion that came from hiding the shipping table starts to collapse. Merchants who still hide the price behind “contact sales” simply fail the filter. An agent cannot book a demo at 11 p.m. and should not have to.
Know when to stop, and when to ask
Unlimited search is not a gift if it delays a purchase the person needed today. The loop should stop when more looking cannot beat the best feasible offer by enough to matter, or when the brief was a specific link and the alternatives are not the same thing. Then it shows its work: the winner, the price, what it beat. The Visa buy, or an x402 payment, is not in this chapter. Those rails start after the person accepts the winner.
Autonomy in the find is a duty to be tireless and a duty to be boring. The interesting part of the purchase, if there is one, was supposed to stay with the human. The agent’s glory is a shortlist that did not depend on who bought the top of the page.
Published by FindBuyAgent.com. Canonical URL findbuyagent.com/blog/how-an-agent-shops.