OfferTest AI
Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

OfferTest AI tests a Meta ad before it spends. An AI agent reads every promise in the ad, then shops the funnel like a real customer to prove whether each promise holds. Ads promise discounts, prices, free shipping, trials and downloads. When the store breaks one of those promises, the ad keeps running and the advertiser pays for clicks that cannot convert. Ad tools check the ad. Site tools check the site. Nothing checks the funnel between them. OfferTest does. Muse Spark Open reads the promises. Muse Wonder clicks through the funnel in a real browser, judges each promise from word-for-word evidence and screenshots, and proposes a fix. It also tests the checkouts that AI shopping agents use. On 41 labeled ads, OfferTest got all 41 right, in two separate runs. The same Meta models, reading only the landing page, got 15. It checks ads before launch and every 6 hours after, from Muse Code, the command line or Ads Manager, and pauses any ad whose offer breaks. Advertisers spent $63 billion on Meta ads last quarter. OfferTest makes sure the offers behind that spend are real. Built solo during the hackathon. Open source.