More than 100 companies have signed up as Sierra released version 1.0 of its Personal Agent Protocol, or Poppy, on Thursday, November 13, 2026, setting a standard for how autonomous AI shoppers interact with business websites.
Shopify turned the protocol on for every store on its platform without requiring merchants to change their setups. Poppy handles incoming agents by identifying them, while Shopify’s existing shopping protocol manages carts and checkout. Customers sign in using standard logins and retain control over what their agents can access.
Meta’s Muse agent, which more than 10 million people have set up, now looks for Poppy first on every site it visits. Sierra and Meta first unveiled the standard in October.
More than 60 additional companies joined the launch, bringing the total to over 100 participants. Delta Air Lines, Intuit, Salesforce, and Zoom are among the signed enterprises.
Banking firm Mercury lets agents check balances and start payments that still go through standard account approval rules. Turkish Airlines lets agents check fares and find business-class upgrades, which customers approve before paying.
The specification remains labelled a draft despite the version 1.0 designation, meaning future updates could break existing setups. Poppy is one of several efforts to set rules for AI shoppers alongside Visa and Mastercard building ID checks for agents, while Amazon encourages shoppers to use its own agent rather than Muse.
