We support the similar types of Bulk SMS on SMS API also which we allow it on User Interface. You can visit for the Types of SMS Sent on Reseller/User UI.
You will have to pass the parameter for respective SMS types such as,
For Quick SMS: Use sendMethod as quick
For Group SMS: Use sendMethod as group
For File Upload: Use sendMethod as file
Note: Above parameters and values are configurable as per your requirement.