Errors
How ngrok error codes work, how to use them when troubleshooting or handling errors programmatically, and the most common errors.
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Documentation Index
Fetch the complete documentation index at: /docs/llms.txt
Use this file to discover all available pages before exploring further.
How ngrok error codes work, how to use them when troubleshooting or handling errors programmatically, and the most common errors.
| Code | Message |
|---|---|
| ERR_NGROK_100 | Invalid metadata length: VAL bytes. Max: MAX |
| ERR_NGROK_108 | Your account is limited to MAX simultaneous ngrok agent sessions. |
| ERR_NGROK_1205 | You failed to solve the CAPTCHA, please try again. |
| ERR_NGROK_1226 | You are disallowed from creating an ngrok account due to violation of the terms of service. |
| ERR_NGROK_3004 | The server returned an invalid or incomplete HTTP response. |
| ERR_NGROK_3200 | The endpoint ENDPOINTURL is offline. |
| ERR_NGROK_3208 | The ngrok account that was hosting this webpage has been banned for violation of ngrok’s Terms of Service. |
| ERR_NGROK_4011 | Your password must be at least LENGTH characters. |
| ERR_NGROK_4013 | You may not create a new account because you are already a member of the free account “ACCOUNT_NAME”. Upgrade or delete that account first before creating a new account. |
| ERR_NGROK_4100 | The email or password you entered is not valid. |
| ERR_NGROK_4101 | A user with the email address EMAIL already exists. |
| ERR_NGROK_4108 | Sign ups are disallowed for the email provider “DOMAIN”. Sign up with a different email provider. |
| ERR_NGROK_6022 | Before you can serve HTML content, you must sign up for an ngrok account and install your authtoken. |
| ERR_NGROK_6024 | You are about to visit HOSTPORT, served by SERVINGIP. This website is served for free through ngrok.com. You should only visit this website if you trust whoever sent the link to you. |
| ERR_NGROK_8012 | Traffic successfully made it to the ngrok agent, but the agent failed to establish a connection to the upstream web service at ADDR. |
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