Sierra has released version 1.0 of Personal Agent Protocol, or Poppy, a standard for how personal AI agents deal with companies. Shopify has turned it on for every store, Meta’s Muse agent now looks for it on every site, and more than 100 companies have signed up.

Sierra has released version 1.0 of Personal Agent Protocol, or Poppy, its standard for how personal AI agents deal with companies, the startup announced on Thursday. Shopify has switched it on for every store on its platform.

Poppy lets a company tell a visiting AI agent who it is talking to and what it is allowed to do, such as check an order or book a flight. Customers sign in through standard logins and decide what their agent 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, the AI customer service company led by former Salesforce co-CEO Bret Taylor, says 60 more companies have joined, taking the total to more than 100. They include Delta Air Lines, Intuit, Salesforce and Zoom.

Shopify stores need to do nothing. Poppy handles the moment an agent arrives and identifies itself, while Shopify’s existing shopping protocol handles carts and checkout. The agent must ask the shopper before taking certain actions.

A few companies are already live. Banking firm Mercury lets agents check balances and start payments, which still go through the account’s approval rules. Turkish Airlines lets them check fares and find business-class upgrades, which customers approve before paying.

The rules are not final. Sierra calls it version 1.0, but the specification is still labelled a draft and allows changes that could break existing setups.

Sierra and Meta first unveiled Poppy in October. It is one of several efforts to set rules for AI shoppers, as Visa and Mastercard build ID checks for agents. Amazon, meanwhile, wants shoppers to use its own agent rather than Muse.