# IQTService4 Interface

Namespace: [PIX.Services.V12.Api4](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.Services.V12.Api4.htm)  
Assembly: PIX.dll

## Syntax

```
public interface IQTService4
```

## Methods

| Name | Description |
| --- | --- |
| [GetKey()](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.Services.V12.Api4.IQTService4.GetKey.htm#PIX_Services_V12_Api4_IQTService4_GetKey) |  |
| [GetQvServicesConfigValues()](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.Services.V12.Api4.IQTService4.GetQvServicesConfigValues.htm#PIX_Services_V12_Api4_IQTService4_GetQvServicesConfigValues) |  |
| [GetSystemInformation()](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.Services.V12.Api4.IQTService4.GetSystemInformation.htm#PIX_Services_V12_Api4_IQTService4_GetSystemInformation) |  |
| [GetTimeLimitedRequestKey()](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.Services.V12.Api4.IQTService4.GetTimeLimitedRequestKey.htm#PIX_Services_V12_Api4_IQTService4_GetTimeLimitedRequestKey) |  |
| [Ping()](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.Services.V12.Api4.IQTService4.Ping.htm#PIX_Services_V12_Api4_IQTService4_Ping) |  |
| [QMSPing()](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.Services.V12.Api4.IQTService4.QMSPing.htm#PIX_Services_V12_Api4_IQTService4_QMSPing) | Alternate Ping which will monitor if called by different client machines and respond if this is the case. |

### Extension Methods

[ApiFilter.FilterFor<T>(T, Nullable<ApiVersion>)](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.ApiFiltering.ApiFilter.FilterFor.htm#PIX_ApiFiltering_ApiFilter_FilterFor__1___0_System_Nullable_PIX_ApiVersion__)