Meta, Sierra and partners develop Personal Agent Protocol for AI agents dealing with businesses
Overview
Sierra has published a draft of the Personal Agent Protocol, called Poppy, and named 35 additional design partners, including Adyen, Bank of America, Mastercard, OpenAI, PayPal and Visa.
Under the draft, companies publish a /.well-known/poppy.json discovery file, and personal agents start sessions, identify themselves and sign in through OAuth, with session tokens limited to approved access. Sierra says design workshops and a reference implementation will follow over the next month.
Meta, Walmart, Stripe and Sierra first announced the protocol as an open standard for how personal AI agents interact with businesses online, and Sierra co-founder Bret Taylor said anyone can implement it. ElevenLabs says it has joined the working group and wants its business agent channels, including phone, website, email, WhatsApp and SMS, covered by the standard. The effort responds to a call from six major banks, including Bank of America and Capital One, for industry standards on transparency, safety, privacy, choice and interoperability.
Written by AI from the articles below · updated Oct 9, 5:15 PM ET
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Developments
3 developments
- Oct 9, 5:12 PM ET · 1 articleElevenLabs joins Personal Agents Protocol working group on standards for agents interacting with businessesElevenLabs: ElevenLabs joins Meta and Sierra on standards for agents interacting with businesses
- Oct 9, 3:56 PM ET · 1 articleSierra publishes draft Personal Agent Protocol (Poppy) and adds 35 design partnersSierra Blog: Sierra publishes draft Personal Agent Protocol, called Poppy, with 35 new design partners
- Oct 6, 8:54 PM ET · 2 articlesMeta and Sierra Announce Personal Agent Protocol for Agent-Business Interactionindigo: Meta and Sierra Announce Personal Agent Protocol for Agent-Business Interaction
Article timeline
The articles in this story. Times are ET.
ElevenLabs@ElevenLabsOfficialElevenLabs joins Meta and Sierra on standards for agents interacting with businessesAIElevenLabs says it is working on new standards for agents that interact with businesses as part of the Personal Agents Protocol working group led by Meta and Sierra. The company says businesses use its platform to deploy agents across phone, website, in-app, email, WhatsApp, SMS, and other text and voice channels. ElevenLabs says its goal is to ensure all of those channels are covered so customers can define how they interact with personal agents.
- Sierra BlogOfficialPickSierra publishes draft Personal Agent Protocol, called Poppy, with 35 new design partners
AISierra has published a draft of the Personal Agent Protocol, known as Poppy, and named 35 additional design partners, including Adyen, Bank of America, Mastercard, OpenAI, PayPal, and Visa. Under the protocol, companies publish a /.well-known/poppy.json discovery file, and personal agents start sessions, identify themselves, and sign in through OAuth with session tokens limited to approved access. The company says the draft will be followed by design workshops and a reference implementation over the next month.
- ElevenLabs BlogOfficialElevenLabs releases synthetic voice detection in ElevenAgents for business calls
AIElevenLabs is releasing synthetic voice detection in ElevenAgents, which analyzes a caller's speech in the first few seconds and labels it as human or AI generated. Businesses can then set rules, such as prioritizing verified humans, limiting AI callers to bounded exchanges, or stopping impersonation attempts before sensitive actions. The feature is available now to enterprise customers supported by its Forward Deployed Engineering team, and will reach a broader group of enterprise customers later this month as a configurable option.
indigo@indigoxXMeta and Sierra Announce Personal Agent Protocol for Agent-Business InteractionAIMeta and Sierra announced the Personal Agent Protocol, an open standard for how personal AI agents find and transact with businesses on a user's behalf. The author says it defines discovery, OAuth-based sessions, and a choice among website, API, or company agent routes, and distinguishes it from MCP, which connects agents to tools and data, and A2A, which hands tasks to another agent.

- SiliconANGLE · AINewsMeta, Walmart, Stripe and Sierra back Personal Agent Protocol for AI shopping agents
AIMeta, Walmart, Stripe and Sierra Technologies are partnering on a Personal Agent Protocol that would define how AI agents interact with businesses online. Sierra co-founder Bret Taylor said it will handle authentication and give companies visibility into personal agents' activity, and it is open for anyone to implement. The effort responds to concerns from six major banks, which urged the industry last month to set standards around transparency, safety, privacy, choice and interoperability.
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