Amazon blocked Meta’s Muse and Shopify let it check out. Here’s what merchants should check.

Amazon gave three reasons. Meta didn’t tell Amazon that Muse would shop there. The agent doesn’t identify itself when it browses. And it appears to capture and store customer credentials. “Third-party applications that offer to make purchases on behalf of customers from other businesses should operate openly and respect service provider decisions about whether or not to participate,” an Amazon spokesperson told GeekWire. Amazon took the same position against Perplexity’s Comet browser, which we covered in March.

Meta’s security write-up says credentials a user enters go “straight to secure storage” that the main agent can’t see, and are filled into the browser only when needed. The same write-up says the Muse Secure VM “does not prevent Meta from accessing data when necessary to support, secure or operate the service.” Either way, Amazon sees a signed-in customer session with an agent driving it and nothing that says so. That objection would stand even if Amazon sold no ads.

Amazon does sell a lot of ads. Its advertising revenue reached $68.6 billion in 2025, up 22%. Much of that comes from sponsored listings shown while shoppers browse, and an agent that goes straight to checkout skips them. Prime Video ads are also in that figure, so not all of it depends on search results. Amazon also runs its own agent, Buy for Me, which places orders on other brands’ sites. Amazon says brands can opt out. Some brands say they never agreed to be included.

Our view: Amazon’s stated reasons hold up, and it applies them selectively, since its own agent shops on other brands’ sites. Merchants should take the credential concern seriously whatever Amazon’s motive is.

Shopify’s path works differently. Muse finds products through Shopify Catalog. The customer pays in a Shopify-powered direct checkout with Shop Pay. The order is attributed to Meta. The agent never needs the shopper’s store login, and it arrives through a channel Shopify set up for it. That is close to what Amazon asked Meta to do.

For eligible stores that sell to customers in the US, Canada, or Mexico, Meta direct checkout is on by default. The merchant stays the merchant of record and keeps fulfillment, returns, and customer service.

Shopify charges no separate channel fee. Shop Pay orders run on Shopify Payments, so Shopify earns its processing fee on each Muse order. Shopify President Harley Finkelstein told investors in August that agentic transactions “carry the exact economics as an online store transaction,” as the Motley Fool reported.

Shopify’s chargeback page is direct about liability: “Shopify isn’t liable for chargebacks that occur when using the Shopify platform.” The merchant of record is the one who answers when a Muse customer disputes a charge.

Blocking or allowing an agent settles whether it reaches checkout. A dispute turns on a different question: what did the customer approve?

Meta’s write-up says that when Muse reaches a checkout page on a site where the customer’s payment details are saved, it asks the customer to approve “the exact details of the purchase every time.” That describes checkout inside Muse’s browser. We haven’t found a Meta or Shopify document that describes how approval works on the Shop Pay path.

Here’s why that matters. A customer asks Muse for running shoes under $150. Muse buys a $140 pair. Two weeks later the customer disputes the charge and says they never chose those shoes. Maybe the agent picked a pair the customer didn’t approve, which is what we’ve called authorized agentic fraud. Maybe the customer approved it and changed their mind. The approval record decides which. If Muse asked for approval, that record is in Meta’s systems.

What reaches the merchant is an order. Shopify’s help page says Meta orders are displayed “in your Shopify admin in the same way as for any other sales channel.” The page says nothing about the customer’s instruction, budget, or approval. A valid payment shows the card was authorized. It doesn’t show what the customer asked for, which is why authorization needs an outcome record.

1. Find your Muse orders. In Orders, filter by Channel and pick Meta. Add the Chargeback and inquiry status filter to see disputes on those orders. Track refund and chargeback rates for this set apart from your other channels.
2. Write down your evidence. Open one Meta order and list what you could submit if the customer disputed it. If the list is the order confirmation and a tracking number, decide now whether that’s enough for an order an agent placed.
3. Decide whether to stay in. Shopify turned direct checkout on for you. After the first month, compare Muse refund and chargeback rates with your other channels. Then keep it on or switch it off at Sales channels → Agentic → Meta.

Amazon and Shopify both made decisions about access. The next decision is about records. We think the customer’s approval should travel with the order to the merchant who answers the dispute. If you sell through the Meta channel, ask Shopify whether it will.