Sierra, Meta Publish Personal Agent Protocol Backed by Walmart
TL;DR
- Six founding partners are named (Walmart, Shopify, Stripe, Genesys, Instinct, Rocket) but the three platforms controlling most agent traffic — Amazon, OpenAI, and Anthropic — are not among them.
- TechCrunch documented blocking across Amazon, Delta, United, Zillow, Yelp, and eBay, distinguishing intentional blocks (Amazon's deliberate policy) from accidental ones caused by Cloudflare's September anti-crawler update.
- Bret Taylor leads the initiative as Sierra co-founder while simultaneously serving as OpenAI board chair, a structural conflict that sharpens OpenAI's absence as a founding partner.
Sierra and Meta on October 6 published a joint proposal called the Personal Agent Protocol, described by The Next Web as 'an open standard defining how personal AI agents authenticate with businesses and what those businesses let them do.' Walmart, Shopify, Stripe, Rocket, Genesys and Instinct are listed as founding partners, with a v0.1 specification due later in October.
The design is OAuth-based with tiered access. Agents can act as guests to 'check stock or a returns policy,' and once customers sign in they 'decide whether it gets read-only or write access,' with sessions that carry across channels so a pre-login question and a post-login order belong to one visit. 'The company chooses whether the agent works through its website, through its APIs using standards such as MCP and OpenAPI, or through an agent of its own,' reads the Sierra announcement post from Bret Taylor and Clay Bavor.
The pitch lands alongside a direct rival. Visa's Trusted Agent Protocol, launched in June, already lets agents 'buy from about 175 million merchants,' and 'Stripe and Shopify are now in both' camps. Payments, push notifications and more granular permissions are flagged as future extensions rather than v0.1 features.
It is the second agent-commerce standard to court the same acquirers inside four months, arriving in a stretch of 432 agent stories we have logged in 90 days and one day after our note on Meta scaling back staff use of Anthropic's Claude.
What others are reporting
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CNBC Read →
Frames the standard as a response to active market chaos, with user complaints across social media showing agents blocked by both deliberate policy and inadvertent anti-bot infrastructure.
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TechCrunch Read →
Grounds the announcement in named, documented real-world blocks at Amazon, Delta, United, Zillow, and Yelp, and explains how Cloudflare's September crawler policy change is inadvertently catching legitimate agents.
Turning away a personal agent means turning away the customer behind it. We'd rather work with businesses to address the underlying concerns.
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Forkast Read →
Leads with absent players and consumer distrust data: only 3% of US adults trust AI agents with purchases, making adoption dependent on whether holdouts will join.
Personal AI is creating a new front door to the enterprise. Brands need a trusted way to know who an AI agent represents.
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MLQ AI Read →
Most granular on technical specs: OAuth tiers, interaction modes (web, MCP/OpenAPI, conversational agent), named full partner list, and v0.1 timeline of late October 2026.
Customers would decide whether an agent receives read-only or write access, while businesses set the actions they allow.
Originally reported by thenextweb.com
Read the original article →Original headline: Sierra and Meta Launch Personal Agent Protocol, OAuth-Based Open Standard Backed by Walmart, Shopify and Stripe