agent identity

advancedspreading

Agent identity is the AI agent's own verifiable digital identity, revealing who it is, on whose behalf it acts, and what it is authorized to do.

In plain terms

If a courier brings a package to an office building, they receive an access card with their name on it at the reception. The card shows which company they are from, which floor they may go up to, and the system records when they were inside. Agent identity is this same access card for an AI agent.

It is needed because the agent not only answers but also acts: it reads emails, books appointments, modifies data, and even pays. If it does this with your password, no one outside can distinguish it from you. With its own identity, however, it is visible that an agent acted and on whose behalf.

It is different from your user account and also from the older 'service accounts' used by programs. Since an agent decides the next step independently, it is advisable to grant it narrower, time-limited, and revocable permissions.

How it works

Registration: the agent receives its own identifier in a company or service provider's system, and the responsible party is recorded.
Authentication: when an agent accesses a system, it proves its identity with a short-lived digital credential (token or certificate).
Power of attorney: the certification also states on whose behalf the agent acts and exactly what permission it received, for example, it may read your calendar but not delete from it.
Verification: the receiving system checks with every request whether the operation fits the permission and rejects it if not.
Logging and revocation: every step is logged under the agent's name, and permission can be revoked at any time without changing your own password.

An everyday example

You ask your AI assistant to book a table and add it to your calendar. A window pops up: "This agent requests access to your calendar – do you allow it?" If you agree, the agent works with its own identifier and your authorization, and you can later revoke its rights with a single click in the settings.

Who is affected

entrepreneur, executiveYou must know how many agents work in your company, what they have access to, and who is responsible for them; otherwise, you will have uncontrolled 'ghost employees'.

developerYou must ensure the agent works with its own, restricted permissions rather than a shared password or hardcoded key. → Code

bank customer, online shopperIf an agent buys or transfers money on your behalf, the bank and the merchant must know that you truly authorized it and up to what amount.

everyoneOn more and more websites and in administrative procedures, you encounter an agent instead of a human, and it is a legitimate expectation to find out who owns it and what it can do.

A common misconception

MythAgent identity means the AI has personality, consciousness, or legal personhood.

In realityThis is purely a technical identifier and permission management, like an access card. Responsibility remains with the person or company operating or commissioning the agent.

Limits and risks

An identifier only proves who the agent is and what it is authorized to do, not whether it will decide well or according to your intent.
If you grant overly broad permissions, a deceived agent (for example, manipulated with a hidden instruction) can cause damage even with a valid identifier.
There is no single, universally accepted standard yet, so solutions from different manufacturers do not always work together.
If the agent entrusts another agent, the chain of authorization can quickly become opaque, making it hard to say who is responsible for what.

Similar, but not the same

user account – The account identifies you, while agent identity refers to software that typically acts on behalf of a person or company within limited boundaries.
API key – An API key is a password-like secret code that grants access but does not by itself reveal who is using it or on whose behalf; agent identity records this as well.
agent-persona – A persona is the agent's name, style, and role in the conversation, while identity is its verifiable identifier and authorization in the background.

Related concepts

Broader

identity and access management, AI safety, AI governance

Narrower

agent authentication, delegated authority, agent registry

On the edge

AI-agent, machine identity, principle of least privilege, Model Context Protocol, multi-agent system

A brief history

Identifying machines and programs is a long-standing IT task; the OAuth 2.0 authorization standard still in use was released in 2012. With the spread of autonomous AI agents, starting in 2025, it became a distinct topic that agents require their own identifiers separate from humans'.

Where things stand

By the end of 2026, the major cloud and identity management providers already offer dedicated agent identifiers, and companies are starting to keep registers of their agents. However, there is still no unified, industry-wide accepted standard; standardization is under way.

Status: 2026 November

In the news

Appears in 1 Agent Age stories; the curve shows weekly occurrence in the news magazine.

Agent identity: LexisNexis, Mastercard and Trulioo build Know Your Agent toolsNov 4, 2026 · Money

Also known as

agent identity · agent identity · AI agent identity · agentic identity · agent identifier · agent ID · agent identity

Sources

IETF RFC 6749 – The OAuth 2.0 Authorization Framework

This entry was machine-edited and has undergone machine expert review; the “In the news” section updates automatically from Agent Age stories.