# SERVICE\_KEY\_HTTP\_HEADER Field

Namespace: [PIX.Services](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.Services.htm)  
Assembly: PIX.dll

## Syntax

```
public const string SERVICE_KEY_HTTP_HEADER = "X-Service-Key"
```

## Returns

| Type | Description |
| --- | --- |
| System.String |  |