Too many connections! The tunnel session <SESSION> has violated the rate-limit policy of <THRESHOLD> connections per minute by initiating <COUNT> connections in the last <SECONDS> seconds. Please decrease your inbound connection volume or upgrade to a paid plan for additional capacity.

Further help

If you're having trouble resolving this error, please reach out to

Additional Info

ngrok limits the number of inbound connections to your tunnels. Limits are imposed on connections, not requests. If your HTTP clients use persistent connections aka HTTP keep-alive (most modern ones do), you'll likely never hit this limit. ngrok will return a 429 response to HTTP connections that exceed the rate limit. Connections to TCP and TLS tunnels violating the rate limit will be closed without a response.

Back to errors overview