HTTP response header

The number tells the user how many times this version of a page has been served from the cache. A MISS indicates the page was not served from cache. The x-pass-why header will tell the user the reason why the request did not hit the cache.

Header usage statistics

X-Pass-Why response header information and usage statistics.

Websites using header X-Pass-Why 21,012
Percentage of websites that use X-Pass-Why header <0.1%
Total discovered header values 12
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

Connected technologies

Technologies that utilize the header

WP Engine, category Platform as a Service, total 296,157 websites

Distribution by websites popularity

X-Pass-Why detection in the top websites by popularity

Top 10k sites 11 websites
Top 100k sites 113 websites
Top 1m sites 933 websites

Websites utilizing X-Pass-Why

List of websites that use X-Pass-Why header

Domain Country Rank Contacts
www.jonathancoulton.com United States of America 1,848
thirstyaffiliates.com United States of America 2,034
3dprint.com United States of America 2,052
amplifyplugins.com United States of America 2,435
plumvillage.org United States of America 3,512
vtdigger.org United States of America 3,713
See full domain list
Flat price per the report, subscription is not required.

Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common X-Pass-Why header values

Header value Value prevalence
custom-path 51.03%
special path 25.99%
special param 8.74%
pass-path 4.17%
custom-cookie 3.86%
logged-in 3.07%
wp-admin 1.43%
special cookie 0.68%
custom-args 0.54%
pass-cookie 0.40%
auth 0.06%
wpe-cookie 0.03%