Fast API not working? Having trouble linking your Binance account to LOT?
No worries — check the solutions for each error case below!
🔗 Quick Navigation
1) You need to complete KYC verification
Your Binance account hasn’t finished identity verification (KYC).
How to fix it
Go to the Binance app or website → Identity Verification (KYC)
Complete the verification process
Return to League of Traders and try connecting Fast API again
2) Binance Futures needs to be enabled
This error appears when the Futures (derivatives) feature is not activated on your Binance account.
How to fix it
Open Binance → Futures menu
Review and accept the terms and risk warnings
Complete Futures activation
Go back to League of Traders and reconnect Fast API
3) Only main or master accounts are supported
This happens if you try to authenticate using a Sub-account on Binance.
How to fix it
Log in to Binance and check if you’re using the main account
If it’s a Sub-account, log out and sign in again with the main account
Retry Fast API connection from League of Traders
4) Only one Fast API authentication key can be created
This occurs when your Binance account already has a Fast API key generated and you're trying to create another one.
How to fix it
Go to Binance → API Management
Find and delete any existing LOT/FastAPI-related API keys
Return to League of Traders and reconnect Fast API
If you’ve followed the steps above and still experience issues,
please feel free to contact us anytime through 1:1 Support — we’re here to help! 🙌