Amazon.com Inc. (NASDAQ:AMZN) has blocked Meta Platforms Inc.’s (NASDAQ:META) Muse AI agent from shopping on Amazon.com, escalating a dispute over how third-party agents access online stores. Amazon’s 2026 agent rules require automated systems to identify themselves and stop accessing its services when requested.

Musk Questions Amazon’s Ability To Detect Agents

Elon Musk questioned whether those restrictions will remain enforceable as agents become tied to users’ browsing sessions. "Amazon won’t be able to tell whether the buyer is a human or an AI acting on their behalf if access is via the user’s IP address & cookies," Musk wrote Monday on social media platform X.

Muse, launched on Sept. 8, can browse the web, fill forms and make purchases after receiving user approval. Meta says each Muse runs inside a dedicated Secure VM, while passwords and payment methods remain hidden from the agent in protected credential storage. Meta delayed Muse for months while addressing safety concerns before release.

Read Also: Meta's Muse Hits No. 1, Carrying AMD Into the $1-Trillion Club

Amazon Tightens Rules As Agent Competition Grows

The clash comes as Amazon builds its agentic shopping ecosystem. The company combined Rufus and Alexa+ this year into Alexa for Shopping, which can compare products, track prices, build carts and automate purchases. Amazon said in July that active users were nearly double, while interactions rose more than fivefold year over year.

Amazon has fought similar battles before. It sued Perplexity AI over its Comet shopping agent, alleging the tool accessed customer accounts without authorization while disguising automated browsing as human activity. A federal judge temporarily blocked Perplexity’s agent in March, though the company appealed.

Meta Expands Muse Across Online Commerce

Meta, meanwhile, is pushing Muse deeper into commerce. Its launch materials say the agent can check out through Stripe’s Link, with Shop Pay support planned. Shopify now lists Meta as an AI sales channel, and a partnership will let Muse users shop across Shopify stores and complete purchases through Shop Pay.

Read Also: Elon Musk Says Tesla Has Offered FSD to Legacy Automakers, but ‘None’ Have Accepted So Far

Photo courtesy: Shutterstock