Meta’s Muse AI Agent Sparks Commerce Standoff: Amazon Blocks, Shopify and PayPal Partner

On September 20, 2026, Amazon began displaying a pop-up that barred Meta’s Muse AI personal agent from browsing and purchasing on Amazon.com, citing a violation of the site’s terms of use. The block arrived two weeks after Muse launched on September 8, 2026. In the same period, Shopify announced on September 21, 2026 that Muse would support “agentic checkout with Shop Pay” across all Shopify stores, and PayPal announced on September 22, 2026 a partnership to let its customers shop through Muse at PayPal merchants worldwide.

Social Media TodayPayPal Announces Checkout With Meta's Muse, the AI Agent Amazon Blocked Meta Muse Downloads Are Surging — But There's a Trust Problem The New Stack

Muse is marketed as a “personal superintelligence” that can act on a user’s behalf—booking travel, reading emails, and completing purchases. The agent runs inside a dedicated “Muse Secure VM” that drives a regular web browser for tasks such as shopping, while using built-in connectors for services like Gmail and OpenTable.

PayPal Announces Checkout With Meta's Muse, the AI Agent Amazon Blocked

• 2.5 million downloads in the first 13 days (?1.5 million iOS, 1.1 million Android).

Meta Muse Downloads Are Surging — But There's a Trust Problem

• 642,000 daily active U.S. users in the same period, compared with 231,000 for ChatGPT at launch.

Meta Muse Downloads Are Surging — But There's a Trust Problem

• Muse briefly topped the U.S. App Store, overtaking ChatGPT.

Meta Muse Downloads Are Surging — But There's a Trust Problem

• Meta’s stock rose more than 20 % in the two weeks after launch, with options volume reaching 4.5 × the 30-day average and $3.9 billion in premium traded.

Meta Muse Downloads Are Surging — But There's a Trust Problem

• Joseph Turow, professor emeritus at the University of Pennsylvania, warned that “people are going to be very wary” of Muse, noting that early adopters may be limited to companies they already trust.

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• Neither side has provided technical evidence that can be independently verified.

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• Legal footing: Amazon’s enforcement relies on updated Terms of Use dated August 14, which now require agents to identify themselves in user-agent strings and to stop when asked. The Ninth Circuit’s August ruling on the Perplexity case clarified that the user, not the assistant, is the statutory “accessing party,” but it did not resolve the specific question of credential storage.

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• “In the coming years, I expect that Muse is going to grow into the personal superintelligence that billions of people around the world are going to use to accomplish their goals and improve their lives,” — Mark Zuckerberg, Meta CEO

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• “People are going to be very wary,” — Joseph Turow

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Industry analysts note that the IETF draft “Web Bot Auth” and implementations such as Cloudflare’s signature verification and AWS WAF Bot Control are gaining traction as ways for merchants to authenticate agents without exposing user credentials. Both Amazon and Meta are expected to continue negotiating technical and policy solutions, while other retailers may adopt similar identity-based approaches. The outcome will shape whether AI agents like Muse can operate across major e-commerce platforms or remain confined to partner ecosystems such as Shopify and PayPal.

The New StackMeta Muse Downloads Are Surging — But There's a Trust Problem PayPal Announces Checkout With Meta's Muse, the AI Agent Amazon Blocked Social Media Today