ERR_NGROK_729: This ngrok account has reached its TCP connections limit for the month

What does ERR_NGROK_729 mean?

ngrok returns ERR_NGROK_729 with this message:

This ngrok account has reached its TCP connections limit for the month. Log into https://dashboard.ngrok.com/billing to view your options.

Troubleshoot ERR_NGROK_729 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.