I continue to struggle with the MCP server actually working inside of ChatGPT. I have a business account for my entire team, and I enable the Atlassian MCP for everyone (built-in). It does not ask for me or anyone on my team to authenticate. The ChatGPT agents cannot use the tool at all. I have disabled / re-enabled it.
Claude and Cursor IDE work just fine (except that Cursor pops open 4-9 windows to reauthenticate like twice a day - another issue to report)