How Can I Resolve the 'Insufficient Quota Detected' Error in n8n Despite Ample OpenAI Limits?

Below is a checklist of steps to help narrow down the cause of the “Insufficient quota” error you’re seeing in your workflow:

1. Confirm Correct API Credentials

• Verify API Key & Organization:
  Even though you’ve tested multiple OpenAI accounts with high limits, make sure that the OpenAI API key configured in your n8n credentials exactly matches the one shown in your OpenAI dashboard.
  • In n8n, navigate to your OpenAI credentials and confirm that the correct key is used.
  • Log in to your OpenAI account and double-check that the key is still active and linked to the organization that has sufficient quota.

2. Check How n8n Relays Quota Information

• Internal Credential Settings:
  In n8n online (or n8n Cloud), some settings—like direct database or detailed billing info—might be abstracted away. This means you may not see details such as the database information or full execution settings that you’d usually have in a self-hosted instance.
  • If you’re running online, note that the limited visibility of backend settings is expected.
  • The error might be generated by n8n’s internal quota checks even if OpenAI’s dashboard shows plenty of available credits.

3. Test the API Call Outside of the Node

• Use an HTTP Request Test:
  To rule out issues specific to the OpenAI node:
  • Use the HTTP Request node in n8n configured with the same OpenAI API key.
  • This can help you see a more detailed error message returned directly from the OpenAI API, which might provide clarity on whether the error truly originates from OpenAI or due to how n8n handles the key/organization settings.

4. Consider n8n Cloud/Online Environment Caveats

• New User Environment:
  As a new user running n8n online, some details mentioned in troubleshooting guides (like database settings) might not be directly visible or configurable.
  • If you’re unable to locate settings referenced in the documentation, they might be managed automatically by the platform.
  • In this situation, consider reaching out to n8n support if after checking the credentials and testing with an HTTP Request node the issue still persists.

5. Next Steps

• Double-check all configuration details:
  Ensure that the OpenAI API key is correctly entered and that there isn’t any mix-up between different API keys if you have multiple accounts.
• Use the HTTP Request node for more insights:
  This often provides a more detailed error response. Look for additional headers or messages that could point to where the quota issue is coming from.
• Contact Support:
  Since you’re new to the online version of n8n and some backend settings aren’t visible, it might be helpful to contact n8n support for further inspection of your account configuration.

By following these steps, you should be able to determine whether the issue is due to a misconfiguration on the n8n side or if there’s another factor at play. Let me know if you need further clarification or help with any of these troubleshooting steps.