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Meta, Sierra and six other companies are developing the Personal Agent Protocol, an open standard for how personal AI agents connect with businesses. Its first specification and a reference implementation are expected by the end of October 2026; details of the technical rules and adoption plans have not yet been published.
Meta, Sierra and six other companies are developing an open standard for how personal AI agents interact with businesses, Sierra co-founders Bret Taylor and Clay Bavor said in a blog post on Tuesday, October 6. The Personal Agent Protocol is intended to cover authentication and access permissions, giving consumers a way to control what agents can access and businesses a way to set limits on what agents can do.
The group includes Genesys, Instinct, Rocket, Shopify, Stripe and Walmart, alongside Meta and Sierra. According to Taylor and Bavor, the protocol will support interactions through company websites, APIs or company-operated agents. The companies say the aim is to provide a consistent connection method while letting each business decide which actions and information it makes available.
The version 0.1 specification is scheduled for publication by the end of October, together with a reference implementation intended to help developers begin using it. The protocol will be available for anyone to implement, according to the Sierra co-founders’ post. The announcement did not provide the specification itself, so its detailed technical requirements are not yet public.
Meta said the effort is intended to address practical questions such as how agents securely convey a user’s identity, how businesses can direct agents toward suitable website flows or APIs, and how personal agents communicate with business agents on a customer’s behalf. Those are stated design goals; the companies have not yet disclosed the final mechanisms or shown how the protocol performs in use.
If adopted, a common protocol could reduce the need for businesses to build separate integrations for each personal-agent product. It could also give companies a defined way to limit agent activity and route requests to approved services, while allowing users to grant access rather than treating an agent as having unrestricted authority.
The stakes extend beyond convenience. Personal agents may handle tasks that involve accounts, purchases or other sensitive information, making identity, permission and business controls central to whether companies and customers trust these systems. The announcement sets out an intended framework, but it does not establish that the standard will be widely adopted or that it will resolve security and privacy risks.
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Companies Move Toward Agent Commerce
The protocol announcement comes amid recent activity around personal AI agents. PYMNTS reported that Meta’s personal AI agent, Muse, launched on September 8 and reached the top of App Store charts within days, according to its September 23 report. On September 28, Instinct said its valuation had risen to $10 billion, quadrupling from a month earlier. OpenAI introduced AI agents called Dots on September 29, describing them as built to handle tasks.
These developments provide context for companies’ interest in how agents interact with services, but they do not demonstrate that any of those products will use the Personal Agent Protocol. Meta described the protocol as an effort to establish shared infrastructure, comparing the goal to the way multiple parties developed common standards that enabled email.
“The company decides what it makes available, the personal agent gets a consistent way to connect, and the customer gets a faster way to get things done.”
— Sierra co-founders Bret Taylor and Clay Bavor
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Protocol Details Still Pending
The partners have not published the version 0.1 specification, so it is not yet clear how authentication will work, how users will grant or revoke permissions, or how businesses’ limits will be enforced. The announcement also does not explain how disputes, errors or unauthorized actions would be handled.
It remains unclear which companies will implement the standard first, whether other major agent providers or businesses will join, and whether the protocol will support consistent behavior across different agents and industries. The announcement describes the standard as open to implementation, but does not commit any named partner to a launch date for a customer-facing integration.
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The October Specification Is Next
The next stated milestone is publication of the Personal Agent Protocol version 0.1 and its reference implementation by the end of October 2026. Those materials should show developers the proposed connection and control mechanisms in greater detail.
After publication, the clearest indicators of progress will be whether participating companies release implementations, whether outside developers adopt the protocol, and how the partners address identity, permissions and safeguards in practice. No further release dates or adoption targets were included in the announcement.
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Key Questions
What is the Personal Agent Protocol?
It is a proposed open standard for how personal AI agents connect and interact with businesses. Its announced scope includes authentication, user access choices and limits businesses can set on agent activity.
Which companies are developing it?
The announced participants are Meta, Sierra, Genesys, Instinct, Rocket, Shopify, Stripe and Walmart.
When will the protocol be available?
Sierra’s co-founders said the version 0.1 specification and a reference implementation are expected by the end of October 2026. The announcement did not give a date for a finished standard or consumer product integrations.
Can consumers use it now?
No consumer launch was announced. The protocol is still under development, and the partners have not yet published its specification or announced specific services using it.
What remains unknown about the standard?
The detailed technical rules, permission controls, security safeguards and adoption plans are not yet public. The partners also have not said which implementations will be available first.
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