Certain API calls require specifying client type based on specific client application making the API calls. Please find below resulting numeric values and associated value descriptions:
Value  | 
Description  | 
0  | 
Unknown client application.  | 
1  | 
Mobile client application.  | 
2  | 
Web client application.  | 
3  | 
Desktop client application.  | 
4  | 
Mobile Administrator client application.  |