ERR_NGROK_6509: Tunnel group label key length is limited to between MIN and MAX; key NAME has VAL characters - ngrok documentation

What does ERR_NGROK_6509 mean?

ngrok returns ERR_NGROK_6509 with this message:

Tunnel group label key length is limited to between <MIN> and <MAX>; key <NAME> has <VAL> characters.

Troubleshoot ERR_NGROK_6509 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_6509?

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