← Back to glossaryGlossary

Agent Card

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

An agent card is a machine-readable description of an agent's identity, capabilities, endpoints, and authentication requirements. Other systems use it to discover what the agent can do and how to call it.

§01 / QUESTIONSterm: Agent Card
Questions

Common questions.

What is Agent Card?

An agent card is a machine-readable description of an agent's identity, capabilities, endpoints, and authentication requirements.

How is Agent Card used in production?

Other systems use it to discover what the agent can do and how to call it.

Which terms are related to Agent Card?

Closely related concepts include Agent Hijacking, Claims-Based Identity, Machine Identity, Agent Passport. Each is defined in the Prefactor glossary.

§02 / RELATEDnext: where this fits

See how every agent performs, and make it better

Prefactor helps teams observe, evaluate, and improve their AI agents in production, across every framework and provider.