field Registered
Verified 2026-09-18 · registry updated 2026-08-28

Cache-Status

Describes how a cache handled a response.

Use Cache-Status for observability across cache layers, while avoiding sensitive internal topology or user data in its values.

httpheadercacheobservability

Reference (http)

Cache-Status: CDN; hit; ttl=300

Use Cache-Status for observability across cache layers, while avoiding sensitive internal topology or user data in its values.

Common mistakes

  • Treating Cache-Status as a stable application contract or leaking internal cache details.

IANA registry: http-fields/field-names · structured type: List

Registry reference: RFC 9211: The Cache-Status HTTP Response Header Field

Permalink: https://merginit.com/reference/http/field-cache-status