Tool to automate via API's

Tool to automate via API's

Hello, 

I want to automate some task within our instance of Zoho analytics via the APIs (Delete's with specific criteria, Select-Insert using download then Insert etc) 
I can do this via Postman, but when I try to schedule the tasks, the scheduling does not work (I have an open case with Postman about this). 
What tools to are others using to call the Zoho APIs?
In my search for a tool, the blocker has been the OAUTH 2.0 authentication. 

Thanks 

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