standard

Vary (HTTP header)

A standard HTTP response header naming the request fields an intermediary cache must consider before reusing a stored response for a new request.

Known aliases

Vary
Vary header

Relationships

No evidence-backed relationships are recorded.

Current clusters

build1 publisher

Cloudflare hands the Vary normalization call to whoever writes the Cache Rule

Support for the Vary header has landed in Cloudflare's Cache Rules on every plan. The judgement it moves to the edge is how much of a request header's variation deserves a cache entry of its own.

Publishers:blog.cloudflare.com

Reality

Evidence58
Adoption20
Hype gap+8
Incentives78
Confidence55