ERR_NGROK_107: The authtoken you specified is properly formed, but it is invalid

What does ERR_NGROK_107 mean?

ngrok returns ERR_NGROK_107 with this message:

The authtoken you specified is properly formed, but it is invalid.
This usually happens when:
    - You reset your authtoken
    - Your authtoken was for a team account that you were removed from
    - You are using ngrok link and this credential was explicitly revoked
Go to your ngrok dashboard and double check that your authtoken is correct:
https://dashboard.ngrok.com/get-started/your-authtoken

Troubleshoot ERR_NGROK_107 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Why does ngrok return ERR_NGROK_107?

The authtoken in your configuration file is no longer valid. You can learn more about the location of the ngrok.yml configuration file here.

You may have been removed from a team where you were formerly a member or your credential was explicitly revoked. In this case, your authtoken will no longer be valid to access the team account.

How do I fix ERR_NGROK_107?

Your authtoken may have been reset. Please check to make sure your authtoken at https://dashboard.ngrok.com/get-started/your-authtoken matches the one that appears in your ngrok.yml configuration file.

Please contact your former team’s account owner if you think you have been removed from the team in error or if you believe your credential should still be active.

You are using the tunnel credentials api and your authtoken has been deleted, or is malformed. Please provision a new one.

​What does ERR_NGROK_107 mean?

​Why does ngrok return ERR_NGROK_107?

​How do I fix ERR_NGROK_107?

​Where can I get more help with ERR_NGROK_107?

What does ERR_NGROK_107 mean?

Why does ngrok return ERR_NGROK_107?

How do I fix ERR_NGROK_107?

Where can I get more help with ERR_NGROK_107?