RE: Has anyone successfully tested Oauth 2.0 in Postman?
Hi all,
I am brand new to Oauth 2.0 so I may be making some pretty large mistakes here. I tried to follow along through the Help pages and SuiteAnswers, and did not get any errors during the setup of the Integration Record.
I am using “https://oauthtest/callback” as the “redirect URI”
I can get all the way to the login and permission screen in Postman for NetSuite,
However, once I try to click Continue, Postman states there was an error and to check the console logs. The log just states:
“Error: Could not complete OAuth 2.0 token request”
Interestingly enough, when I navigate to the “OAuth 2.0 Authorized Applications” page in NetSuite, I see the Users/Roles I tried to log in with, and the correct scope. I am just trying to see if anyone knows if this is an error with Postman or with my setup in NetSuite.
Any/all feedback is much appreciated!
Client Authentication should be set to Send as Basic Auth header.
If you want to read a rather long thread: https://netsuiteprofessionals.slack.com/archives/C29HQS63G/p1587504058334000?thread_ts=1587498204.325800&cid=C29HQS63G might help.

THANK YOU!
Reading the thread, I noticed I had the Access Token URL wrong as well. I needed:
https://ACCOUNTID.suitetalk.api.netsuite.com/services/rest/auth/oauth2/v1/token
So hopefully, to help the next soul is wading into the Oauth 2.0 waters, here is the working setup in NetSuite AND Postman:
Create an Integration record like you normally would, only need to check the Authorization Code Grant and give a valid URI.