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