Loading timecard in otl through HDL vs REST

Summary:

Hi,

Some of our seasonal employees dont use employee self-service so they are submitting the paper-based timesheets. Admin users are manually reviewing these timesheet and use the time admin screen and manually enter the timesheet.

We are in the process using a scan software and scan these paper-based timehsheets, export the data and then load them into Fusion OTl so the timecards created automatically

Question:

1. Is there an HDL to load this timecard

I found this link on HDL. I have also seen some documents on REST.

2. I see the REST API's 'time event request'.

I wanted to see if we have to use POSTMAN to load this. What is the best way or software to use the REST APIs