ERR_NGROK_1660: The endpoint configuration exceeds the maximum number of OAuth emails

What does ERR_NGROK_1660 mean?

ngrok returns ERR_NGROK_1660 with this message:

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

Troubleshoot ERR_NGROK_1660 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.