[ Authentication type ](/en-
US/docs/Web/HTTP/Authentication#authentication_schemes) . A common type is [
"Basic" ](/en-US/docs/Web/HTTP/Authentication#basic_authentication_scheme) .
IANA maintains a [ list of authentication schemes
](https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml) .

realm=<realm>

    

A description of the protected area, the realm. If no realm is specified,
clients often display a formatted host name instead.

##  Examples

http

    
    
    Proxy-Authenticate: Basic
    
    Proxy-Authenticate: Basic realm="Access to the internal site"
    

##  Specifications

Specification  
---  
[ HTTP Semantics  
#  field.proxy-authenticate  ](https://www.rfc-
editor.org/rfc/rfc9110#field.proxy-authenticate)  
  
##  Browser compatibility

BCD tables only load in the browser  with JavaScript enabled. Enable
JavaScript to view data.

##  See also

  * [ HTTP authentication ](/en-US/docs/Web/HTTP/Authentication)
  * [ ` Authorization ` ](/en-US/docs/Web/HTTP/Headers/Authorization)
  * [ ` Proxy-Authorization ` ](/en-US/docs/Web/HTTP/Headers/Proxy-Authorization)
  * [ ` WWW-Authenticate ` ](/en-US/docs/Web/HTTP/Headers/WWW-Authenticate)
  * [ ` 401 ` ](/en-US/docs/Web/HTTP/Status/401) , [ ` 403 ` ](/en-US/docs/Web/HTTP/Status/403) , [ ` 407 ` ](/en-US/docs/Web/HTTP/Status/407)

##  Help improve MDN

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