X-Turbo-Charged-By
The HTTP X-Turbo-Charged-By response header is an unofficial HTTP header identifying a response served by a LiteSpeed web server with its built-in caching engine active.
Note
The "X-" naming convention for HTTP headers, "X" referring to "experimental", has been deprecated and needs to be transitioned to the formal naming convention for HTTP headers.
Usage
LiteSpeed Web Server adds the X-Turbo-Charged-By header automatically when its LSCache engine processes a response. The header acts as a server branding indicator, similar to the Server header but specific to LiteSpeed's caching layer.
When this header appears
alongside the X-LiteSpeed-Cache header, the response was both
served by LiteSpeed and handled by its caching system.
Administrators concerned about exposing server details remove
this header through server configuration or a reverse proxy
using proxy_hide_header.
Values
LiteSpeed
The only known value is LiteSpeed, indicating the
response was processed by LiteSpeed Web Server's
LSCache caching engine.
Example
A response served by LiteSpeed Web Server with its caching
engine active includes this header. The value LiteSpeed
confirms LiteSpeed's LSCache processed the response.
X-Turbo-Charged-By: LiteSpeed
A typical response from a LiteSpeed-powered site includes several related headers. The Server header names the server software, while X-Turbo-Charged-By and X-LiteSpeed-Cache confirm the caching layer is engaged.
Server: LiteSpeed
X-Turbo-Charged-By: LiteSpeed
X-LiteSpeed-Cache: hit
Takeaway
The X-Turbo-Charged-By header is a LiteSpeed-specific
branding header indicating the response passed through
the LiteSpeed caching engine. The only value observed in
production is LiteSpeed.