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This guide shows you how to use ngrok from a Google Colab notebook using the pyngrok library. It covers installing pyngrok, adding your ngrok authtoken, and starting a tunnel from Colab.

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What you’ll need

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1. Install pyngrok in your notebook

In a Colab cell, install pyngrok: 
!pip -q install pyngrok

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2. Add your ngrok authtoken

In a new cell, add your ngrok authtoken: 
from pyngrok import ngrok

ngrok.set_auth_token("YOUR_AUTHTOKEN")

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3. Start a tunnel

Start a tunnel to your local port (for example, 8080): 
tunnel = ngrok.connect(8080)
print(tunnel.public_url)
Use the printed URL to access your service through ngrok.