claude-code - 💡(How to fix) Fix [Bug] Notion MCP OAuth callback returns Internal Server Error [1 comments, 2 participants]

Notion MCP OAuth authentication fails with Internal Server Error 4. Callback page shows "Internal Server Error" Actual: OAuth callback returns Internal Server Error

TL;DR

The Notion MCP OAuth authentication issue may be resolved by investigating and fixing the server-side error handling for the OAuth callback.

Guidance

• Review the server-side logs to identify the specific cause of the Internal Server Error, as the provided error list is empty.
• Verify that the OAuth flow is correctly configured and that the callback URL is properly set up.
• Check the Claude Code version documentation (v2.1.92) for any known issues or updates related to OAuth authentication.
• Test the OAuth flow with a different Notion account or environment to isolate the issue.

Notes

The lack of error details in the provided JSON output limits the ability to provide a more specific solution. Additional logging or debugging may be necessary to identify the root cause.

Recommendation

Apply workaround: Investigate and fix the server-side error handling for the OAuth callback, as it is likely causing the Internal Server Error.