I’m working on a NetSuite integration and initially struggled with OAuth 1.0, so I switched to OAuth 2.0. I successfully obtained an access token using the authorization code flow, but when I try to use it in a GET request to my RESTlet’s external URL (just to return a simple test response), I keep getting a 500 Internal Server Error. I also tried using the same access token to connect to the SuiteTalk API, but that returned a 401 Unauthorized error, even though I’m using the token correctly. My script is a basic SuiteScript 2.1 RESTlet that returns a simple message.

I’m using an administrator-level custom role with the following permissions all set to Full:

• Access Token Management

• Integration Application

• Log in using Access Tokens

• Log in using OAuth 2.0 Access Tokens

• REST Web Services

• Set Up SOAP Web Services

• SuiteScript

“Web Services Only Role” is not enabled.

Any advice on what I might be missing to get OAuth 2.0 working with RESTlets or SuiteTalk would be greatly appreciated. Thank you in advance.