HTTP registry: 0x03

N/A

HTTP/3 registry values apply to QUIC-backed streams, frames, settings, or protocol negotiation. 0x03 is registered in HTTP/3 Settings. Defining reference: rfc9114.

httpregistryhttp3-parametershttp3-parameters-settings

Identifier (http)

0x03

N/A

Preserve HTTP semantics while accounting for QUIC migration, TLS/ALPN negotiation, and early-data replay risk.

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

IANA registry: http3-parameters/http3-parameters-settings

Registry reference: rfc9114

Sources

HTTP/3 Settings
rfc9114