Man uses AI to call 3,000 pubs to track beer prices across Ireland

An AI engineer built an AI voice agent to call over 3,000 pubs across Ireland to track the prices of Guinness beer. Matt Cortland then processed the data using Anthropic's Claude to create a "consumer price index" for a pint of Guinness, called "Guinndex". The data reportedly prompted some pub owners to reduce pint prices.