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Registration and Installation

In order to use Classiq, one must register to the Classiq platform, where it is available for free for non-commercial use. After registering to the platform, one can also install the Python SDK package and authenticate their account. In the following we will guide you through both steps.


First, go to and press the Sign Up button. Then, after approving the terms of use, you can register with your Google/Microsoft accounts, or with any other email:

Then a screen with further information needs to be filed:

And upon completion, you will be moved to the home page of the Classiq platform and the registration has been completed.

Slack Registration

Classiq has a vibrant and active Slack community that is really helpful for technical questions and support, as well as for general quantum computing questions and discussions. In order to join our Slack Community, press here and sign up to the Classiq Community Slack workspace with your Google/Apple account or with a general email:

Python SDK Installation

The Classiq platform has an accompanied Python SDK package that is integrated with the Classiq platform. After registering to the platform, one can install the SDK package.

The package should be installed using pip with:

pip install -U classiq

Once the package is installed, the device being used should be authenticated with your Classiq account. In Python, execute the following two lines:

import classiq

A confirmation window is then opened in your web browser and you should confirm the authentication:

Once you receive a confirmation you are good to go!

If you encounter an issue, look for a solution in the troubleshooting section or ask in our community Slack.

Platform Version Updates

Every few weeks a new version of the Classiq platform is launched. The web-based IDE at is automatically updated. The Python SDK package should be updated manually with the command:

pip install -U classiq

In order to update the Python SDK for a specific version, you should run in the terminal the following:

pip install classiq=={DESIRED_VERSION}

and replace the DESIRED_VERSION with the number of your desired version, e.g. 0.40. You can check what version of Classiq is installed with:

pip show classiq

NOTE - At any point, only the last 3 versions of Classiq are supported. E.g., if the current version is 0.41, so only versions 0.41, 0.40 and 0.39 are supported. You can check the Active Classiq Versions page for more information.

Python SDK Installation Troubleshooting

Device is not Authenticated Try to use the following command from your Python:
import classiq
Authentication on Headless LINUX Systems The authentication procedure on headless Linux systems stores the tokens locally in a credentials file. While you must still run the authentication once, it can be done on another system with a browser.
Confidential Information Pop Up on Apple computers In some Apple computers, the following might pop-up:
Make sure to insert your device password and to press the `Always Allow` button **twice**.