Sierra Releases Personal Agent Protocol (Poppy) v1.0: Live for Everyone on Meta's Muse, Automatically Enabled for Every Shopify Merchant, With More Than 100 Design Partners

Background and the problem it solves

Personal agents are taking on more everyday tasks that end at a company, but the usual choices are still extremes: the company blocks the agent, or the agent signs in as the person and can do anything they can. In October, Sierra, Meta and their partners proposed Personal Agent Protocol (Poppy) as an open standard for discovery, identity and permissions. On November 13, co-founders Bret Taylor and Clay Bavor announced Poppy v1.0 on the official blog, about five weeks after the first draft.

Architecture and mechanisms

A company publishes its channels and capabilities at /.well-known/poppy.json. Sign-in uses OAuth, and one session can cover the website, APIs (OpenAPI / MCP) and the company's own agent. Version 1.0 reflects what design partners learned testing drafts against real websites, APIs and agents: companies can adopt it in stages, and extensions let industries add capabilities without changing the core. Shopify co-authored a commerce extension that links Poppy with Universal Commerce Protocol (UCP): UCP handles finding products, filling a cart and checkout, while Poppy covers what happens when an agent arrives, identifies itself and learns what it is allowed to do. The extension also lets an agent shop as a guest or signed in, and requires the customer's approval before certain actions.

Benchmarks

This is a protocol and rollout update. Sierra has published no performance benchmarks or pricing. The official coverage figures are: Poppy is on for everyone who uses Meta's Muse, which looks for Poppy first on every site it visits; every Shopify store now automatically publishes a Poppy file, with no extra work from the merchant, and Shopify says it powers businesses in more than 175 countries. Sierra also says 60 more companies have joined as design partners, bringing the total to more than 100; the full list is in the official blog.

Getting started

Any company can implement v1.0 from the specification. Sierra provides an implementation kit and a validator, and once a company is live, Muse users get the improved experience immediately. Partners already live include Mercury, where a personal agent can check balances and categorize spending, and can initiate a payment or transfer only through the account's approval policy, and Turkish Airlines, where agents can check fares, flight status and stopovers, and Miles&Smiles members can have their agent find business-class upgrades that the customer approves before paying. Synchrony is exploring how to bring financing and rewards into agent-led shopping, and mentions a network of more than 500,000 merchant locations — that figure is Synchrony's existing network, not a count of locations already on Poppy.