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The Upgrade Compatibility Tool is an ALPHA version with limited scope, available for all Adobe Commerce merchants, and only validating PHP Commerce APIs and GraphQL schema. If you are a Magento Commerce user you can download it at the Magento repo.

The Upgrade Compatibility Tool ALPHA is a command line tool that checks a Magento instance against a specific version by analyzing all the non-Magento modules installed on it.


The following diagram shows the expected workflow when running the Upgrade Compatibility Tool:

Upgrade Compatibility Tool Diagram

Who is the Upgrade Compatibility Tool for?

The following use case describes the typical process for a Magento partner to upgrade a client’s Magento instance:

  1. A partner’s Software Engineer downloads the Upgrade Compatibility Tool package from the Magento repository and executes it during the beta phase of the newest Magento release. See the Download the Upgrade Compatibility Tool topic for more information.
  2. The Software Engineer sees that there are several customized areas broken in the inventory and catalog modules and they also get a complexity score of X. See the Developer guide for more information on the complexity score.
  3. With this information, the Software Engineer is able to understand the complexity of the upgrade and is able to relay this information back to the partner’s Account Manager.
  4. The Account Manager creates a timeline and cost for the Magento upgrade, which allows them to get their manager’s approval.
  5. With their manager’s approval, the Software Engineer works on the required code modifications to fix the broken modules.
  6. The Software Engineer runs the Upgrade Compatibility Tool one more time with a Magento pre-release to ensure there are no new issues and that their code changes fixed the problems found during the beta phase.
  7. Everything checks out and the Software Engineer pushes the code to a staging environment where regression tests confirm all tests are green, which allows them to release the latest Magento version to production the same day that the Magento pre-release is released.

Upgrade Compatibility Tool audience

Contact Upgrade Compatibility Tool

To connect with the Upgrade Compatibility Tool team:

  1. Contact us on the Engineering Slack channel Upgrade Compatibility Tool.
  2. Send us an email at

See the Resources page for more information.


See prerequisites for more information.

You can run the Upgrade Compatibility Tool in any operating system. There is no requirement to run the Upgrade Compatibility Tool where your Magento instance is located. It is necessary for the Upgrade Compatibility Tool to have access to the source code of the Magento instance. For example, you can install the tool on one server and point it at your Magento installation on another server.

If you are running the Upgrade Compatibility Tool against a Magento instance with large modules and files, the tool might require a high amount of RAM, at least 2GB RAM.

Magento best practices recommend to avoid having 2 modules with the same name, if this happens the Upgrade Compatibility Tool shows a segmentation fault error.

To avoid this segmentation fault error it is recommended to run the bin command with the added option -m:

bin/uct upgrade:check /INSTALLATION_DIR/<instance-name> --coming-version=2.4.1 -m /vendor/<vendor-name>/<module-name>

The INSTALLATION_DIR value is the directory where your Magento instance is located.

The -m option allows the Upgrade Compatibility Tool to analyze each specific module independently to avoid encountering 2 modules with the same name in your Magento instance.

This command option also allows the Upgrade Compatibility Tool to analyze a folder containing several modules:

bin/uct upgrade:check /INSTALLATION_DIR/<instance-name> --coming-version=2.4.1 -m /vendor/<vendor-name>/

This recommended command also helps with memory issues that can occurr when executing the Upgrade Compatibility Tool.

Download the Upgrade Compatibility Tool

To download the Upgrade Compatibility Tool, run the following command:

composer create-project magento/upgrade-compatibility-tool uct  --repository

As the Upgrade Compatibility Tool is an independent tool, if you try to run:

composer require magento/upgrade-compatibility-tool

It might add the Upgrade Compatibility Tool as a dependency for a Magento project.


To install the Upgrade Compatibility Tool, you must install the necessary prerequisites:

  • Magento access keys
  • Composer
  • Node.js (only required to check GraphQL compatibility)

Refer to the Upgrade Compatibility Tool install page.

Magento access keys

You must have Magento access keys to download and use the Upgrade Compatibility Tool. Add your Magento access keys to your auth.json file, which is located at ~/.composer by default.

Check your COMPOSER_HOME environment variable to see where the auth.json file is located.

The public key corresponds to the username whereas the private key is the password:

Example of Magento access keys

    "http-basic": {
        "": {
            "username": "YOUR_MAGENTO_PUBLIC_KEY",
            "password": "YOUR_MAGENTO_PRIVATE_KEY"


Clone the Upgrade Compatibility Tool repository and run composer install in your terminal to install dependencies.

If the Magento access keys are not correctly configured, the Upgrade Compatibility Tool will not install and you will get errors when running the composer install command.


To install Node.js, see the Node.js documentation.

Node.js is only a requirement to check GraphQL compatibility.

Third-party extensions

Magento recommends that you contact your extension vendor to determine whether your extension is fully compatible with Magento 2.4.

See Run the tool for information about executing the Upgrade Compatibility Tool.