Insufficient Quota Error Despite Available Budget and Usage - n8n Integration

API
1

I’m getting an “Insufficient quota detected” error when calling OpenAI API from n8n, but my dashboard shows I’m well within limits:

Current Status:

  • Total spend: $35.97 / $120 budget (plenty remaining)
  • Total tokens: 380,792,652
  • Total requests: 155,763
  • API key: Created Nov 5, 2025, last used today
  • Project: Default project, user “Algominds”

The Error:

Insufficient quota detected. You exceeded your current quota, please check your plan and billing details.

What I’ve Already Tried:

  • Verified billing is active with payment method on file
  • Confirmed API key is correct and has “All” permissions
  • Checked usage dashboard - well below budget
  • Contacted support (waiting for response in “coming days” but need fix now)

Questions:

  1. Could this be a rate limit (tokens/minute) rather than monthly quota?
  2. Where do I find per-minute/per-hour rate limits in the dashboard?
  3. Are there separate limits for the specific model I’m using?

Using this in production workflows - any immediate troubleshooting steps would be hugely appreciated!

2

Welcome to the community.

Budget is an arbitrary value that you can set for your own planning, but they are not actual credits. All requests require that you have a positive prepaid balance.

When you look into your balance dashboard, do you have a positive value?

You may also need to check if any of your previous reloads didn’t expire (they expire after about 1 year). You can see expired credits here.