Judge Blocks Perplexity AI Agents from Shopping on Amazon

Judge Orders Perplexity to Stop AI Shopping Agents on Amazon

A federal judge has blocked Perplexity's AI agents from making purchases on Amazon, ruling that the startup's Comet browser accessed user accounts without authorization. US District Judge Maxine Chesney issued the order on Monday after Amazon provided "strong evidence" of unauthorized access. Amazon sued Perplexity in November, claiming the AI startup had repeatedly ignored cease-and-desist requests to stop its agentic shopping feature. The ruling marks a significant moment for AI automation tools and their interaction with major e-commerce platforms, establishing clearer boundaries around what AI agents can and cannot do on behalf of users.

What Happened: The Court Order

Judge Chesney's ruling prevents Perplexity from using its Comet browser to execute shopping transactions on Amazon accounts.

Key details of the order:

• Unauthorized access: Perplexity's Comet accessed Amazon user accounts without explicit authorization from Amazon
• Feature blocked: The agentic shopping capability that allowed AI to purchase products on users' behalf is now prohibited
• Immediate effect: The injunction takes effect immediately and requires Perplexity to cease all such activities
• Evidence standard: Amazon demonstrated sufficient evidence of unauthorized marketplace intrusion

Why This Matters: AI Automation and Account Security

This ruling establishes important precedent for how AI automation tools must operate within third-party platforms and user accounts.

Impact areas:

• E-commerce automation: AI agents must now obtain explicit platform authorization before executing transactions
• User account security: The decision reinforces that AI tools cannot access accounts without proper permission protocols
• AI startup compliance: Companies building agentic features must establish formal agreements with platforms before deployment
• Personalized AI limitations: Automation capabilities face stricter regulatory oversight as they scale across services

The Dispute: Amazon's Repeated Requests

Amazon had warned Perplexity multiple times before pursuing legal action.

Timeline of events:

• October 2025: Amazon sent cease-and-desist letter to Perplexity requesting the company stop unauthorized shopping agent access
• November 2025: Amazon filed lawsuit after Perplexity continued operating the feature despite warnings
• Monday ruling: Judge Chesney issued the injunction blocking the practice entirely
• Ongoing case: The broader lawsuit between Amazon and Perplexity continues in court