Personal Agent Protocol
An open standard, backed by Meta, Sierra, Walmart, and others, for how a person's AI agent talks to businesses.
Definition
The Personal Agent Protocol is an open standard, announced by Sierra and Meta in October 2026 with backing from companies including Walmart, Shopify, Stripe, and Genesys, for how a person's AI agent interacts with a business on their behalf. Built on OAuth, it lets a business decide whether an agent reaches it through a website, an API, or the business's own agent, and lets an agent start as an anonymous guest — checking stock or a return policy — before a customer signs in and chooses whether to grant it read-only or write access. It's broader than payment-specific standards like the Agent Payments Protocol, aiming to cover any business interaction, with specifics like payments expected as a later extension.