For new development, we encourage you to use the Verify API instead of the Authy API. The Verify API is an evolution of the Authy API with continued support for SMS, voice, and email one-time passcodes, an improved developer experience, and new features including:
- Access via the Twilio CLI.
- Improved visibility and insights.
- A push authentication SDK embeddable in your own application.
Adding Two-factor Authentication to your application is the easiest way to increase security and trust in your product without unnecessarily burdening your users. This quickstart guides you through building a Python and Flask application that restricts access to a URL. Four Two-factor Authentication channels are demoed: SMS, Voice, Soft Tokens and Push Notifications.
Ready to protect your toy app's users from nefarious balaclava wearing hackers? Dive in!
Once logged in, visit the Authy Console. Click on the red 'Create New Aplication' (or big red plus ('+') if you already created one) to create a new Authy application then name it something memorable.
You'll automatically be transported to the Settings page next. Click the eyeball icon to reveal your Production API Key.
Copy your Production API Key to a safe place, you will use it during application setup.
This Two-factor Authentication demos two channels which require an installed Authy Client to test: Soft Tokens and Push Notifications. While SMS and Voice channels will work without the client, to try out all four authentication channels download and install Authy Client for Desktop or Mobile:
Clone our repository locally, then enter the directory. Install all of the necessary python modules:
pip -r requirements.txt
Next, open the file
.env.example. There, edit the
ACCOUNT_SECURITY_API_KEY, pasting in the API Key from the above step (in the console), and save the file as
Once you have added your API Key, you are ready to run! Launch Flask with:
If your API Key is correct, you should get a message your new app is running!
With your phone (optionally with the Authy client installed) nearby, open a new browser tab and navigate to
Enter your information and invent a password, then hit 'Register'. Your information is passed to Twilio (you will be able to see your user immediately in the console), and the application is returned a
Now visit http://localhost:5000/login/ and login. You'll be presented with a happy screen:
If your phone has the Authy Client installed, you can immediately enter a Soft Token from the client to Verify. Additionally, you can try a Push Notification simply by pushing the labeled button.
If you do not have the Authy Client installed, the SMS and Voice channels will also work in providing a token. To try different channels, you can logout to start the process again.
And there you go, Two-factor Authentication is on and your Flask app is protected!
Now that you are keeping the hackers out of this demo app using Two-factor Authentication, you can find all of the detailed descriptions for options and API calls in our Two-factor Authentication API Reference. If you're also building a registration flow, also check out our Phone Verification product and the Verification Quickstart which uses this codebase.
For additional guides and tutorials on account security and other products, in Python and in our other languages, take a look at the Docs.