An AI agent built on Meta's Muse Wonder
OfferTest AI follows your ad's funnel like a customer and tests every promise, before you pay for the clicks.
The ad says
Use code SAVE20 at checkout.
The checkout says
Ridge trail shoeSize 7$120.00This code has expired.
Example from Alder Trail Co., our demo store.
How it works
OfferTest AI pulls the ad from Ads Manager. Muse Spark Open, Meta's open-weight model, reads the text and the image, and writes each promise as a test with a word-for-word quote.
Use code SAVE20 at checkout.
1 promise found
Code SAVE20 gives 20% off the Ridge trail shoe
“Use code SAVE20 at checkout.”
Muse Wonder opens a fresh browser and clicks through like a new customer. It stops at the payment step, so no real money moves.
Each promise gets a pass or a fail. Every result shows the exact words from the ad and from the funnel, so you can check it yourself.
“Use code SAVE20 at checkout.”
“This code has expired.”
Both quotes checked word for word. Screenshots attached.
For each failure, you get one change and where to make it. Fix the offer before the ad launches, or pause a live ad that is broken.
Shopify admin > Discounts > SAVE20 > Active dates
What it catches
When an offer breaks, you still pay for every click. OfferTest AI finds the break first.
Use code SAVE20
FunnelThis code has expired.
20% off
FunnelThe code takes 10% off.
Free shipping
FunnelShipping is charged at checkout.
Free 30-day trial
FunnelThe trial asks for a card.
Free guide
FunnelThe download link is dead.
In stock now
FunnelThe size is sold out.
Features
Test every ad that is about to launch, audit live ads, or click “Test offer” inside Ads Manager with the Chrome extension.
It stops at the payment step. Test purchases run only on test-mode stores, and only after you approve.
Each ad is tested at its real destination, wherever it sends people.
Shoppers now buy through agents such as Meta Muse, ChatGPT, and Gemini. A code can work on your website and still fail there, so OfferTest AI checks agent checkout too.
Open source
OfferTest AI is a command-line tool under the Apache-2.0 license. It also works as a skill in Muse Code, Claude Code, and Codex.
View on GitHub See a real report
$ offertest check --ad 120214455667788
● Reading the ad's promises (Muse Spark Open, open weights)
● Following the funnel like a customer (Muse Wonder)
FAIL Followed to the payment step, not paid
✗ Code SAVE20 gives 20% off the Ridge trail shoe
ad: "Use code SAVE20 at checkout."
funnel: "This code has expired."
Fix: Extend SAVE20 to Nov 9, 11:59 PM, the ad's last day.
Follows the funnel, judges each promise, writes the fix.
Open weights. Turns the ad into testable promises.
Marks the product and the button in the report.
Pulls the real ad and pauses failing ads.
Runs OfferTest AI as a skill.
Consulting
The OfferTest AI team helps you plan and build AI systems for media buying, advertising, and offers.
AI systems that check launches, find wasted spend, and report results to your team.
Automate account checks, QA, and client reporting, so your team can run more accounts.
Test offers and funnels before you scale them, and see where customers drop.