Notion MCP stuck after refresh token invalid_grant; Codex Desktop doesn't prompt re-auth

[zhengxiang378928908-code]

Summary

Notion MCP in Codex Desktop is configured and enabled, but MCP startup fails with OAuth token refresh failed: invalid_grant: Invalid refresh token. Codex Desktop does not trigger a re-auth flow or clearly prompt the user to reconnect Notion, leaving the integration configured but unusable.

Expected behavior

When the refresh token is invalid (revoked/rotated/expired), Codex Desktop should automatically prompt the user to re-authorize Notion (or provide a clear UI to reconnect) so the MCP can start successfully.

Observed behavior

Codex Desktop silently fails during MCP startup with the invalid refresh token error, and Notion remains shown as configured/enabled with no obvious way to reconnect.

Steps to reproduce

1. Set up Notion MCP in Codex Desktop and authorize the integration.
2. Allow the Notion OAuth refresh token to become invalid (revoked/rotated, etc.).
3. Start Codex Desktop.
4. Observe MCP initialize failure with invalid_grant: Invalid refresh token and no re-auth prompt.

Environment

• Codex Desktop: (version not captured)
• Platform: macOS
• Date observed: 2026-03-08

Notes

This is a usability issue: even though the fix is likely "reconnect/re-auth", the UI doesn't surface it. A prompt or a "Reconnect Notion" action would prevent the integration from getting stuck.

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• Supabase MCP repeatedly requires reauthentication: OAuth token refresh failed during initialize #13852
• Your access token could not be refreshed because your refresh token was already used. Please log out and sign in again. #12755
• probleme de connexion codex avec chatgpt plus #13238

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[GunLengend]

Temporary fix:

1. Install CLI npm install -g @openai/codex
2. Open Terminal/Command Prompt and type codex mcp login notion. Complete the authentication.
3. Double check codex mcp get notion. If it shows then check your Codex Desktop App check notion

[linear]

2026-04-02 report from Jiefeng Xu: Notion MCP startup fails again every few days with invalid_grant: Invalid refresh token, and removing/re-adding the Notion plugin in Codex App no longer recovers it. Slack permalink.

This appears to be the same Notion refresh-token re-auth gap.