@MuruganFinastra  Since you are getting a 403 response, the first thing you should do is see what user identity this 403 is being returned for.  For this you'll want to be tailing the nifi-user.log while you attempt to make this rest-api call. You will see the denied related log lines in the nifi-user.log.  That logging will provide the user identity string and which NiFi authorization policy required for which that user identity did not have the required permissions.   Using this output, we can determine the next steps required here.  Is the expected user identity being logged? What is the logged authorization policy resulting in the 403 response? Also which user authentication and authorization configuration options are you using in your setup? Please help our community grow. If you found any of the suggestions/solutions provided helped you with solving your issue or answering your question, please take a moment to login and click "Accept as Solution" on one or more of them that helped. Thank you, Matt ... View more