altSvcHeader

Property Manager name: Alt-Svc Header
Behavior version: The v2025-09-09 rule format supports the altSvcHeader behavior v1.0.
Rule format status: Deprecated, outdated rule format
Access: Read/Write
Allowed in includes: Yes

Sets the maximum age value for the Alternative Services (Alt-Svc) header.

Option Type Description Requires

Option	Type	Description	Requires
`maxAge`	number	Specifies the `max-age` value in seconds for the `Alt-Svc` header. The default `max-age` for an `Alt-Svc` header is 93600 seconds (26 hours).		{"displayType":"number","tag":"input","type":"number"}

maxAge

number

Specifies the max-age value in seconds for the Alt-Svc header. The default max-age for an Alt-Svc header is 93600 seconds (26 hours).

{"displayType":"number","tag":"input","type":"number"}