ERR_NGROK_1656: The endpoint configuration exceeds the maximum number of OAuth scopes

What does ERR_NGROK_1656 mean?

ngrok returns ERR_NGROK_1656 with this message:

The endpoint configuration exceeds the maximum number of OAuth scopes. You specified <COUNT>, the max is <MAX>.

Troubleshoot ERR_NGROK_1656 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Email support@ngrok.com and include the error code.