X-Esi

HTTP response header

It allows an Edge Server (like Fastly�s caches) to "mix and match" content from multiple URLs. Fastly customers can use ESI to cache pages that contain both cacheable and uncacheable content (such as user-specific information).

Header usage statistics

X-Esi response header information and usage statistics.

Websites using header X-Esi3,861
Percentage of websites that use X-Esi header<0.1%
Total discovered header values11
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country US

X-Esi Directives

X-Esi directives value information and usage statistics

DirectiveShareWebsites countUnique Values

Distribution by websites popularity

X-Esi detection in the top websites by popularity

Top 10k sites16 websites
Top 100k sites74 websites
Top 1m sites455 websites

Websites utilizing X-Esi

List of websites that use X-Esi header

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-Esi header values

Header valueValue prevalence
184.80%
enabled7.93%
TRUE2.90%
on2.23%
YES1.53%
00.18%
NO0.16%
4.010.10%
4.020.10%
Do ESI = True0.05%
page0.03%