# IJSONWebTokenHeader Interface

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

## Syntax

```
[ValueClass]
public interface IJSONWebTokenHeader
```

## Properties

| Name | Description |
| --- | --- |
| [alg](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IJSONWebTokenHeader.alg.htm#Qlik_Engine_IJSONWebTokenHeader_alg) | JSON property name: qalg |
| [kid](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IJSONWebTokenHeader.kid.htm#Qlik_Engine_IJSONWebTokenHeader_kid) | JSON property name: qkid |
| [typ](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IJSONWebTokenHeader.typ.htm#Qlik_Engine_IJSONWebTokenHeader_typ) | JSON property name: qtyp |