Origin-Agent-Cluster

Requests origin-keyed isolation for a document’s agent cluster.

Use Origin-Agent-Cluster: ?1 when origin-level isolation is appropriate, after checking compatibility with document sharing and storage behavior.

httpheadersecuritybrowserisolation

Reference (http)

Origin-Agent-Cluster: ?1

Use Origin-Agent-Cluster: ?1 when origin-level isolation is appropriate, after checking compatibility with document sharing and storage behavior.

Common mistakes

Treating it as a replacement for COOP/COEP or as a server-side authorization boundary.

IANA registry: http-fields/field-names · structured type: Item

Registry reference: HTML

Sources