ERR_NGROK_405: You may not reserve a domain with the suffix SUFFIX in the WANT region because names with this suffix must be reserved for the HAVE region - ngrok documentation

What does ERR_NGROK_405 mean?

ngrok returns ERR_NGROK_405 with this message:

You may not reserve a domain with the suffix <SUFFIX> in the <WANT> region because names with this suffix must be reserved for the <HAVE> region. Failed to reserve <DOMAIN>.

Troubleshoot ERR_NGROK_405 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_405?

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