X-Pass-Why
HTTP response headerThe 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 | 3,201 |
| Percentage of websites that use X-Pass-Why header | <0.1% |
| Total discovered header values | 11 |
| 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
108,486 websites
|
Distribution by websites popularity
X-Pass-Why detection in the top websites by popularity| Top 10k sites | 7 websites |
| Top 100k sites | 42 websites |
| Top 1m sites | 375 websites |
Websites utilizing X-Pass-Why
List of websites that use X-Pass-Why header| Domain | Country | Rank | Contacts |
|---|---|---|---|
|
|
United States of America
|
1,778 | |
|
|
United States of America
|
2,052 | |
|
|
United States of America
|
3,512 | |
|
|
United States of America
|
6,546 | |
|
|
United States of America
|
6,811 | |
|
|
United States of America
|
7,925 |
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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 | 73.54% |
| logged-in | 11.28% |
| custom-cookie | 9.78% |
| special cookie | 1.94% |
| wp-admin | 1.41% |
| pass-cookie | 1.34% |
| auth | 0.34% |
| custom-args | 0.25% |
| special path | 0.06% |
| nevercache-ua | 0.03% |
| wpe-cookie | 0.03% |