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 # Field HOST\_KEY

 Last update: 19.06.2026 

Namespace: [Phoenix.ComponentAPI](Phoenix.ComponentAPI.md)  
Assembly: Phoenix.ComponentAPI.dll

## HOST\_KEY

The hostname where the harness is being run.

```csharp
public const string HOST_KEY = "[phx:HarnessRunHostname]"


```

### Field Value

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