act — Actor

Location: payload · Format: json

Identifies the party actually acting on behalf of the token's subject in a delegation/impersonation scenario (RFC 8693 token exchange), as a nested JSON object that can itself contain a further act for multi-hop delegation chains. A verifier enforcing delegation policy needs to walk this whole chain, not just the outermost subject.

Defined in RFC 8693 §4.1.

Decode a JWT and inspect its act claim in the TokenPrism debugger — free, entirely in your browser.