## Zoho Commerce Help Documentation Index

Access the complete documentation index at:
https://www.zoho.com/commerce/developer/llms.txt

Use this file to discover all available documentation pages before proceeding.

# Extension Settings

You can set up the important settings for your extension on the Extension Settings page. You can add a secret key to keep your extensions secure and also add a redirection domain to ensure a smooth installation process between Zoho Commerce and other applications.

## Extension’s Secret Key

A secret key provides an additional layer of security for extensions, serving as a private key that are only known to the extension’s developers and Zoho Commerce. Extension developers can use it to authenticate public API calls. For example, in payment gateway extensions, both the extension developers and Zoho Commerce users can use the extension’s secret key, along with the Zoho Commerce user’s password, to generate and validate the signature for payment request APIs.

To add a secret key for your extension:

*   Go to the Zoho Commerce Developer Portal.
*   Click the **Build** tab at the top of the page.
*   Click **Extension Settings** on the left sidebar.
*   Enter the **Extension’s Secret Key**.
*   Click **Save**.

![Enter the Extension's Secret Key](/commerce/extension/extension-settings.png)

* * *

## Redirection Domain

Let’s say you’re developing an extension for a third-party application and Zoho Commerce. Assume that the installation of the extension in the third-party application requires you to complete the installation of the extension in Zoho Commerce. After the extension is installed in Zoho Commerce, a redirection to the third-party application should occur to complete the extension installation there. This redirection can be achieved by adding a redirection domain in the Zoho Commerce extension. Here’s how:

*   Go to the Zoho Commerce Developer Portal.
*   Click the **Build** tab at the top of the page.
*   Click **Extension Settings** on the left sidebar.
*   Enter the **Redirection Domain**.
*   Click **Save**.

![Enter the Redirection Domain](/commerce/extension/extension-settings.png)

To be redirected back to the third-party application, you need to add the URL of the Zoho Commerce extension in the third-party application. Ensure that you append the parameter ‘installation\_redirect\_url’ in the URL. For example, [https://commerce.zoho.com/extension#/installprivateextension?name\_space=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx&handle=com\_xxxxxx&install\_type=private&version=1.0&installation\_redirect\_url=https://trello.com](https://www.zoho.com/commerce/#/installprivateextension?name_space=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx&handle=com_xxxxxx&install_type=private&version=1.0&installation_redirect_url=https://trello.com)

This URL and the one entered in the Redirection Domain field (in this case, [https://www.trello.com](https://www.trello.com)) will be verified. If both URLs match, the redirection will occur. If they don’t, the user will be redirected to Zoho Commerce.