Hi @moliveira ,
A redirect url serves the following:
If this app is going to be published, you would have a designated url set aside by your company.
If this is a non-publishing app for personal use, you can use google.com as a redirect url and it will append the authorization code to the url in the browser for you to continue authentication.
We have a detailed guide on this here: Guide: Making a Zoom API Call with OAuth Credentials in Postman - #5 by gianni.zoom