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Unique Agent Identity

Reviewed 19 July 2026Canonical definitionPart of: Agent Identity & Access Terms →

A unique agent identity is a stable identifier that distinguishes one agent from every other agent or service. It is the basis for attribution, access control, and audit trails.

§01 / QUESTIONSterm: Unique Agent Identity
Questions

Common questions.

What is Unique Agent Identity?

A unique agent identity is a stable identifier that distinguishes one agent from every other agent or service.

How does Unique Agent Identity work?

It is the basis for attribution, access control, and audit trails.

Which terms are related to Unique Agent Identity?

Closely related concepts include Agent Hijacking, Trust Chain, Agent Card, Agent Retirement. Each is defined in the Prefactor glossary.

§02 / RELATEDnext: where this fits
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Where this fits.

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