ERR_NGROK_351: Your account is rate limited for adding MAX endpoints per INTERVAL

What does ERR_NGROK_351 mean?

ngrok returns ERR_NGROK_351 with this message:

Your account is rate limited for adding <MAX> endpoints per <INTERVAL>.

Troubleshoot ERR_NGROK_351 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.