HTTP registry: expires

Timestamp of proposed signature expiration

HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. expires is registered in HTTP Signature Metadata Parameters. Defining reference: RFC 9421, Section 2.3.

httpregistryhttp-message-signaturesignature-metadata-parameters

Identifier (http)

expires

Timestamp of proposed signature expiration

Interpret parameters only in the context that defines them; unknown parameters must not silently change security or framing behavior.

This registry value is currently marked active by IANA. Follow the defining specification before sending, accepting, or proxying it.

IANA registry: http-message-signature/signature-metadata-parameters

Registry reference: RFC 9421, Section 2.3

Sources

HTTP Signature Metadata Parameters
RFC 9421, Section 2.3