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The Alt-Svc header is used to list alternate ways to reach this website.


Alt-Svc: clear
Alt-Svc: <service-list>; ma=<max-age>
Alt-Svc: <service-list>; ma=<max-age>; persist=1
Comma separated list of service definitions in the format of <service-name>=​"<host-name>:<port-number>", where <service-name> is a valid ALPN identifier.
The time in seconds for which the alternative service is considered valid for establishing new connections. Defaults to 24 hours.
Optional parameter specifying that the alternative service can be remembered between sessions and network changes.


Specification Status Comment
RFC 7838 IETF RFC Initial definition.

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See also

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