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X-Powered-By header

files/en-us/web/http/reference/headers/x-powered-by/index.md

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The HTTP X-Powered-By {{Glossary("response header")}} is a non-standard header for identifying the application or framework that generated the response.

<table class="properties"> <tbody> <tr> <th scope="row">Header type</th> <td>{{Glossary("Response header")}}</td> </tr> <tr> <th scope="row">{{Glossary("Forbidden response header name")}}</th> <td>No</td> </tr> </tbody> </table>

Syntax

http
X-Powered-By: <application>

Directives

  • <application>
    • : A string describing the server application or framework.

Examples

Express X-Powered-By header

Express applications will usually include the X-Powered-By header in responses with the string express as the field value:

http
X-Powered-By: express

Specifications

Not part of any current specification.

See also

  • {{HTTPHeader("X-Forwarded-Host")}}, {{HTTPHeader("X-Forwarded-For")}}, {{HTTPHeader("X-Forwarded-Proto")}} headers
  • {{HTTPHeader("Via")}}
  • {{HTTPHeader("Forwarded")}}