ERR_NGROK_18021: You have exceeded the maximum number of concurrent endpoints allowed for this account - ngrok documentation

What does ERR_NGROK_18021 mean?

ngrok returns ERR_NGROK_18021 with this message:

You have exceeded the maximum number of concurrent endpoints allowed for this account. Log into https://dashboard.ngrok.com/billing to review your usage and https://dashboard.ngrok.com/billing/choose-a-plan to view your subscription options.

Troubleshoot ERR_NGROK_18021 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Where can I get more help with ERR_NGROK_18021?

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