conveys the sender's estimate of the amount of time since the response was generated or successfully validated at the origin server.
Quick facts
Description
conveys the sender's estimate of the amount of time since the response was generated or successfully validated at the origin server.
Syntax
Age: 120
Related status codes
Frequently asked questions
conveys the sender's estimate of the amount of time since the response was generated or successfully validated at the origin server.
It is classified as a response header and can appear in requests or responses depending on context.
Sources & standards
Updated 2026-08-18
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