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Summary: this page provides an explanation of the CAST Extend Website:


The CAST Extend website is the main "hub" for managing extensions. Extensions can be downloaded (official and custom) and uploaded (custom) in a modern graphical interface accessible in your browser. Access requires registration but is open to all.

Sign In

Before you can download/upload an extension using the CAST Extend website, you must first Sign In with your unique login/password. To do so, click the Sign In button in the top right corner of the CAST Extend home screen:

A new screen will be displayed in which you can either enter your user name and password (if you have already registered), or register for access if you have not already done so:

Click OK to sign in.

Register for access

To register for access, click the Register button in the top right corner of the CAST Extend home screen (alternatively you can click Sign In and then choose Register):

Fill in the required fields to create your account and then click Register - note that your email domain name must be preset on a list of valid CAST customer domains before you can register. If you are unable to register due to this, please contact CAST Support.

An email will be sent to your chosen email address when you click the Register button. Please make sure that you click the link contained in the email to ensure that your registration is processed correctly:

Account Management

Clicking your login name in the top right corner will display a screen enabling you to manage your account:

ProfileUse this option to change the email address associated with your account (Email field). Ensure you enter your current password in the Password verification field first.
Change passwordUse this option to change your account password.
Email notification subscription

By default your account will be configured to receive email notifications from the CAST Extend website. If you prefer not to receive any communication, click the Unsubscribe button.

API keyThe API key uniquely identifies your account and is required if you want to use a command line script to upload extensions for sharing with others.
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