---
title: "Register a New Client"
url: https://docs.catalyst.zoho.com/en/api/oauth2/register-new-client/
description: "Learn about the OAuth 2.0 industry-standard protocol adhered by Catalyst that authenticates and authorizes API requests made by users to gain secure access to protected Catalyst resources."
last_updated: 2026-08-17T12:16:04Z
service: All Services
type: api
---

# Step 1: Register a New Client

### Register the Client

The first step towards obtaining an OAuth authentication token is to register your application with Zoho's API console
and obtain your `client\_id` and `client\_secret`.

1. To register your application, visit the [Zoho API Console](https://api-console.zoho.com/) and click **Get Started**.
 ![](https://catalyst-docs-development.zohostratus.in/images/api/catalyst_api_1.webp)
2. Select a client type for your application.
 ![](https://catalyst-docs-development.zohostratus.in/images/api/catalyst_api_2.webp)
 You can refer to [Zoho's OAuth documentation](https://www.zoho.com/accounts/protocol/oauth.html) for more details.

> **Note:** You can choose the _Self Client_ type to test the client-server handling for your application, or if your application does not have a domain. You need not provide any details for this type. You can only create one _Self Client_ client for your user account.

3. Provide the required details to register your application for the client type you chose.
 ![](https://catalyst-docs-development.zohostratus.in/images/api/catalyst_api_3.webp)
   * **Client Name:** The name of your application you want to register with Zoho
   * **Homepage URL:** The URL of your client's homepage
   * **Authorized Redirect URIs:** A valid URL of your application that Zoho Accounts redirects you to with the grant token after a successful authentication
4. Click **Create**.

After the registration is successful, Zoho will provide you a set of OAuth 2.0 credentials: the `client\_id` and `client\_secret`, which are known to both Zoho and your application.

![](https://catalyst-docs-development.zohostratus.in/images/api/catalyst_api_4.webp)

> **Note:** You must not share the `client\_id` and `client\_secret` anywhere. Ensure that you keep these credentials safe.

### Enable Multi DC for the Client

As mentioned in the [Multi-DC Support section](https://docs.catalyst.zoho.com/en/api/introduction/multi-dc-support/#Multi-DCSupport), you can enable multi-DC support for your client from the _Settings_ tab in the API console after you register it. This is available for all client types, except the _Self Client_ type as it is used only for testing.

This feature lets you provide access to your application to users of a specific domain alone. As mentioned earlier, Catalyst is currently available in the **EU, AU, IN, JP, SA** and **CA** domains. So you can enable or disable access to your application for specific DC users if you need.

To access the multi-DC configurations for your client:

1. Open your client from the API console and click **Settings**.
 ![](https://catalyst-docs-development.zohostratus.in/images/api/catalyst_api_9.webp)
2. Enable or disable the client access for the data centers you need. You can only avail the data centers that Catalyst supports.

When you enable a DC, the console will generate a different `client\_secret` for them by default. You can access it by clicking **Show Code** for the respective DC. The `client\_id` will remain the same for all DCs.

You can choose to have the same `client\_secret` for all DCs by checking the **_Use the same OAuth credentials for all data centers_** checkbox. You must then click **OK** in the confirmation pop-up.

![](https://catalyst-docs-development.zohostratus.in/images/api/catalyst_api_10.webp)

You can again unselect the checkbox to have a different `client\_secret`, and confirm the action similarly.