ERR_NGROK_127: Your account is not permitted to use the agent ingress via "IP"

What does ERR_NGROK_127 mean?

ngrok returns ERR_NGROK_127 with this message:

Your account is not permitted to use the agent ingress via "<IP>".

Troubleshoot ERR_NGROK_127 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.