Active Kite Connect App Showing "Invalid api_key" Error

Hi Zerodha Team,

I have created a Kite Connect application named FutureScope and subscribed to the Kite Connect API plan.

My app is showing Active status, and my subscription is valid until 3 December 2026. However, whenever I try to generate the login URL and authenticate through Zerodha, I receive the following error:

{"status":"error","message":"Invalid api_key.","error_type":"InputException"}

I have already verified the following:

API Key matches the one displayed in the Developer Console.

API Secret has been regenerated and updated in my local configuration.

Zerodha Client ID is correct.

Redirect URL is configured as http://127.0.0.1:8000.

The Python Kite Connect package is installed correctly.

The generated login URL contains the correct API Key.

Despite these checks, the login page continues to return the same error.

Could you please verify whether my API Key is correctly provisioned and linked to my active Kite Connect subscription?

I would appreciate your assistance in resolving this issue so I can proceed with my application development.

Thank you.