I am trying to make script in python that will download pdf report off workpackages periodically and save in folders. But I'm unable unsuccessful. I would appreciate guidance from someone.

I'm getting "406 Not Acceptable"

Hello Nanak, this is currently not implemented in the API. But there is a possibility to programmatically download exports. Please have a look at my answer here: https://community.openproject.org/projects/openproject/work_packages/54365/activity#activity-2

Best, Andrej