Vary HTTP response header



Vary response header


Tells downstream proxies how to match future request headers to decide whether the cached response can be used rather than requesting a fresh one from the origin server.


Vary header statistics


Highest ranking websitewww.instagram.com
Unique header value count740
Most used header valueAccept-Encoding
Websites percentage using Vary24.09%


Common Vary header values


Header name Header value Occurence
VaryAccept-Encoding45.9%
VaryAccept-Encoding,Cookie,Authorization6.0%
VaryCookie,Authorization6.0%
VaryCookie5.6%
VaryUser-Agent4.9%
VaryAccept-Encoding,User-Agent2.4%
VaryFastly-SSL2.2%
VaryCookie,1.9%
VaryCookie,Accept-Encoding1.7%
VaryX-UA-Device, Accept, Accept-Encoding1.6%


Top websites that use Vary header


www.instagram.comwww.google.comgoogle.comwww.facebook.com
www.dw.complus.google.comwww.theguardian.comwww.reddit.com
www.nytimes.comwww.bbc.comwww.cnn.comwww.bloomberg.com
www.cnbc.comwww.nbcnews.comnews.google.comwww.reuters.com
www.nypost.comwww.washingtonpost.comwww.huffingtonpost.comwww.usatoday.com


Usage by top level domain (TLD)


Header nameTop level domainOccurence
Varycom24.9%
Varyorg11.3%
Varynet1.5%
Varyde1.2%
Varyio0.8%
Varyedu0.8%
Varyro0.5%
Varych0.4%
Varypl0.4%
Varyco.uk0.3%