# Meta and Sierra Announce Personal Agent Protocol — No Spec Yet, OpenAI Outside

Times of AI Desk · 2026-10-07 · Products

[https://timesof.ai/2026/10/personal-agent-protocol-meta-sierra-walmart-stripe](https://timesof.ai/2026/10/personal-agent-protocol-meta-sierra-walmart-stripe)

> Meta and Bret Taylor's Sierra, with Walmart, Stripe, Shopify, Genesys, Instinct and Rocket, announced Personal Agent Protocol — an OAuth-based open standard for how consumer agents sign in and act on business sites. There is no published spec yet; Sierra plans v0.1 later this month. OpenAI and Anthropic are not part of it for now; Taylor expects them later. TechCrunch also lists NiCE and Decagon among partners.

Personal agents now reach millions of users. The bottleneck is no longer the model — it is whether merchant sites will let the agent in. Meta is co-authoring the handshake.

On **October 6**, Sierra co-founders **Bret Taylor** and **Clay Bavor** announced **Personal Agent Protocol**: an open standard that **Meta and Sierra** are developing with **Genesys, Instinct, Rocket, Shopify, Stripe and Walmart** (Sierra's partner list). Under the design, consumers choose what access their agent has (read-only or write) and companies set what agents may do. An agent discovers options on a company's website and starts a session for its user — guest or signed-in. The session is built on **OAuth** and carries across channels, then completes tasks via the company's website, its APIs (MCP, OpenAPI) or the company's own agent.

There is **no published specification yet**. Sierra plans to publish a **v0.1** later this month, plus design workshops and a reference implementation. Possible later extensions: finer-grained permissions, push notifications and payments.

## Who is in — and who is not

Taylor, who is also OpenAI's chairman, told CNBC "it is kind of chaos until such a standard exists," and said companies will know when they are dealing with a personal agent rather than a person. He said **OpenAI and Anthropic are not on board now** but he expects them to participate.

**TechCrunch** lists a partly different partner set that includes **NiCE and Decagon** (and omits Shopify/Instinct). Use Sierra's list as primary; attribute NiCE/Decagon to TechCrunch.

Meta's **David Singleton** told CNBC that **Muse has millions of US users** — Singleton's claim. That is the product this protocol is meant to unblock: sites from Amazon (which blocks Muse) to airlines, Yelp and eBay are blocking or tripping up personal agents, TechCrunch reports. Muse context: [gadgets/SDK drop](https://timesof.ai/2026/10/meta-muse-gadgets), [Connect glasses / Charm](https://timesof.ai/2026/09/meta-connect-muse-glasses-charm).

## The distribution play

Whoever writes the agent–merchant handshake shapes authentication, liability and, eventually, payments for agent commerce. Meta is co-authoring alongside a commerce coalition while OpenAI and Anthropic sit outside for now. The OAuth-session model also gives businesses a way to tell sanctioned agents from scrapers — the friction behind Amazon's Muse block.

For now this is an **announcement of intent**: no published spec, no named implementations beyond the partners, and partner lists that already disagree between sources.

## Limits

- **No v0.1 yet** — "later this month" per Sierra.
- Partner-list conflict: Sierra vs TechCrunch (NiCE/Decagon attributed).
- Meta's own announcement post was quoted by TechCrunch but not inspected here.
- Muse "millions of users" = Singleton via CNBC.

## Sources

- [Sierra: Introducing Personal Agent Protocol (October 6, 2026)](https://sierra.ai/blog/introducing-personal-agent-protocol)
- [CNBC: Meta joins with group of companies to tame 'chaos' of doing business with AI bots (October 6, 2026)](https://www.cnbc.com/2026/10/06/meta-joins-companies-to-tame-chaos-of-doing-business-with-ai-bots.html)
- [TechCrunch: The next hurdle for AI agents — getting websites to let them in (October 6, 2026)](https://techcrunch.com/2026/10/06/the-next-hurdle-for-ai-agents-getting-websites-to-let-them-in/)
- [Times of AI: Meta Muse gadgets (October 2, 2026)](https://timesof.ai/2026/10/meta-muse-gadgets)
- [Times of AI: Meta Connect Muse glasses / Charm (September 24, 2026)](https://timesof.ai/2026/09/meta-connect-muse-glasses-charm)