X-Esi
HTTP response headerIt 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-Esi | 4,906 |
| Percentage of websites that use X-Esi 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 |
X-Esi Directives
X-Esi directives value information and usage statistics| Directive | Share | Websites count | Unique Values |
|---|
X-Esi header usage distribution by website rank
Geographical Distribution
Header usage distribution by websites across the globe.Websites utilizing X-Esi
List of websites that use X-Esi header| Domain | Country | Rank | Contacts |
|---|---|---|---|
| United States | 749 | ||
| United States | 1,775 | ||
 GB | 3,011 | ||
| United States | 3,102 | ||
| United States | 4,071 | ||
| United States | 5,027 |
Common header values
List of top common X-Esi header values| Header value | Value prevalence |
|---|---|
| 1 | 82.51% |
| enabled | 12.60% |
| true | 2.43% |
| on | 1.22% |
| YES | 0.82% |
| 0 | 0.14% |
| NO | 0.10% |
| 4.01 | 0.06% |
| 4.02 | 0.04% |
| Do ESI = True | 0.04% |
| ESI-PROD-1 | 0.04% |