How to connect to Jira backend?

I am new to Jira. I have worked on QC, we could mass update test cases or defect. I need something similar in Jira, where I could mass update the tasks.

Solution

Probably your best bet is the JIRA REST API

There used to be a SOAP and an XML-RPC API, but both of these have now been depricated.

You can also import JIRA issues using a CSV file: Importing Data from CSV

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