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Ongoing coverage: Retailers pick sides on outside AI shopping agents

eBay bars uninvited AI shopping agents as Microsoft traces 21-hour Exchange outage

eBay bars uninvited AI shopping agents as Microsoft traces 21-hour Exchange outage
Image: PPC Land

Meta's Muse, which HUMAN Security says sends 72% of daily AI agent requests, lost reliable access to eBay listings in early November.

Source: PPC Land

eBay's User Agreement bars "buy-for-me agents, LLM-driven bots, or any end-to-end flow that attempts to place orders without human review" unless eBay has given prior express permission, PPC Land reported. The clause dates to eBay's January 20, 2026 update. What changed in early November is that Meta's Muse agent lost reliable access to eBay listings, a block The Verge reported on November 10 and later described as intermittent. Spokesperson Sybille St. Arromand said eBay has "restricted agent access in certain cases, including unauthorized scraping and training on our data." eBay has not published which agents hold permission or how a developer would request it, according to PPC Land, which cited HUMAN Security's estimate that Muse accounts for 72% of daily AI agent requests.

Microsoft's Exchange Online outage, which began on the afternoon of November 12 US time, had run 21 hours and 21 minutes by Microsoft's 14:56 UTC update on November 13, which still described service as degraded. Microsoft listed 19 Microsoft 365 services affected and warned that Copilot may be unable to access work data such as email, calendar and files. Kentik measured Exchange traffic about 85% below normal, and government offices in Japan, Australia, Singapore and Portugal were affected along with banks and airlines, PPC Land reported.

Microsoft traced the fault to an earlier network capacity upgrade exposed by a recent network change and said it was "not related to cyber or AI / agents." It paused all deployments and extended email timeouts to 48 hours. Exchange Online carries a 99.9% monthly uptime commitment backed by service credits. Search Engine Roundtable reported that Microsoft Advertising was not hit directly.

Read the full article at PPC Land

Our take

eBay requires its permission for outside shopping agents but, according to PPC Land, has not published which agents hold it or how to request it.

  • Ask any agent vendor which marketplaces have explicitly approved it.
  • If support or operations run on Copilot, plan a fallback for when Microsoft 365 data is unreachable.
  • Read Microsoft's post-incident report against your 99.9% service credit terms.

Was our take useful?

Key takeaways

  1. eBay bars order-placing agents without its prior express permission
  2. HUMAN Security puts Meta's Muse at 72% of daily AI agent requests
  3. Microsoft's Exchange outage ran 21 hours 21 minutes and hit 19 services

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Illustration for Retailers pick sides on outside AI shopping agents
Illustration: Digital Influence

Ongoing story17 postsUpdated Nov 14

Retailers pick sides on outside AI shopping agents

The largest retailers and marketplaces are splitting over whether third-party AI agents can shop their stores.