vary Directives (1 total)
- *
vary
HTTP response headerTells 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.
Header usage statistics
vary response header information and usage statistics.| Websites using header vary | 244,802 |
| Percentage of websites that use vary header | 2.30% |
| Total discovered header values | 356 |
| Header uses directives | Yes |
| Header values are unique or random | No |
| Most popular in the country | 
Canada
|
vary Directives
vary directives value information and usage statistics| Directive | Share | Websites count | Unique Values |
|---|---|---|---|
| * | <0.1% | 73 | 1 |
Connected technologies
Technologies that utilize the header
Fastly, category
Content Delivery Networks, total
77,344 websites
|
Weebly, category
Content Management System, total
49,812 websites
|
|
|
Distribution by websites popularity
vary detection in the top websites by popularity| Top 10k sites | 115 websites |
| Top 100k sites | 551 websites |
| Top 1m sites | 5,557 websites |
Websites utilizing vary
List of websites that use vary header| Domain | Country | Rank | Contacts |
|---|---|---|---|
|
|
United States of America
|
60 | |
|
|
United States of America
|
110 | |
|
|
Netherlands
|
161 | |
|
|
United States of America
|
174 | |
|
|
United States of America
|
316 | |
|
|
United States of America
|
363 |
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Geographical Distribution
Header usage distribution by websites across the globe.Common header values
List of top common vary header values| Header value | Value prevalence |
|---|---|
| User-Agent, | 76.41% |
| User-Agent | 11.52% |
| origin, | 3.79% |
| Cookie | 1.72% |
| Accept-Encoding | 1.11% |
| Cookie, | 0.34% |
| Accept-Encoding,Cookie | 0.31% |
| Host | 0.31% |
| X-Forwarded-Proto, | 0.28% |
| Origin | 0.27% |
| Cookie,User-Agent | 0.27% |
| X-IPCountry, | 0.26% |
| Accept | 0.25% |
| X-Forwarded-Protocol, | 0.23% |
| Accept-Encoding,User-Agent | 0.21% |
| x-forwarded-proto | 0.21% |
| Accept-Encoding, Cookie | 0.20% |
| negotiate | 0.19% |
| X-Forwarded-Protocol | 0.17% |
| X-Forwarded-Proto,Accept-Encoding | 0.14% |