http header
Age header
The HTTP Age response header indicates the time in seconds for which an object was in a proxy cache.
The header value is usually close to zero.
If the value is 0, the object was probably fetched from the origin server; otherwise, the value is usually calculated as a difference between the proxy’s current date and the Date general header included in the HTTP response.
| Header type | [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response%20header) |
|---|
Syntax
Age: <delta-seconds>
Directives
<delta-seconds>- : A non-negative integer that represents the time in seconds for which the object was in a proxy cache.
Examples
Age: 24
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.