# HttpKnownHeaderNames.ProxyAuthenticate

Kind: Field  
Namespace: `Sisk.Core.Http`  
Assembly: `Sisk.Core.dll`  
Source: https://docs.sisk-framework.org/api/Sisk.Core.Http.HttpKnownHeaderNames.ProxyAuthenticate.html

## ProxyAuthenticate {#Sisk_Core_Http_HttpKnownHeaderNames_ProxyAuthenticate}

The HTTP Proxy-Authenticate header.

Used by a proxy server to request authentication from the client, indicating the authentication method required.

```csharp
public const string ProxyAuthenticate = "Proxy-Authenticate"
```

### Field Value

[string](https://learn.microsoft.com/dotnet/api/system.string)