> ## Documentation Index
> Fetch the complete documentation index at: https://docs.occtoo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Register an application

> Create the client credentials a consumer needs to call a protected destination.

A **Protected** destination only answers callers holding a valid token. Registering an application produces the **Client ID** and **client secret** used to fetch that token.

<img src="https://mintcdn.com/occtoo/1WzHqAa_CdnC2GBq/images/guides/studio/destinations/destination-applications.png?fit=max&auto=format&n=1WzHqAa_CdnC2GBq&q=85&s=5b3438f37136c0026e07ef5751a6f6e4" alt="The Applications tab" width="1440" height="900" data-path="images/guides/studio/destinations/destination-applications.png" />

<Steps>
  <Step title="Open the Applications tab">
    Open the destination and select **Applications**, then click **Add Application**.

    <Info>
      The tab only exists on a **Protected** version. A Public destination needs no application.
    </Info>
  </Step>

  <Step title="Name the application">
    <img src="https://mintcdn.com/occtoo/1WzHqAa_CdnC2GBq/images/guides/studio/destinations/destination-add-application.png?fit=max&auto=format&n=1WzHqAa_CdnC2GBq&q=85&s=9fe4f6422ef8e7d302bb891758b8f91c" alt="The Add an application dialog" width="1440" height="900" data-path="images/guides/studio/destinations/destination-add-application.png" />

    Give it a **Display name** that identifies the consumer — the storefront, the marketplace connector, the agent — then click **Register application**.
  </Step>

  <Step title="Copy the secret">
    The secret appears once, with a copy control. Copy and store it, then confirm with **I have copied the secret. Close the dialog.**

    <Warning>
      The secret is shown only at creation and cannot be retrieved afterwards. Trying to close the dialog without copying it raises a warning; closing a second time dismisses it anyway — the only way forward is to [reset the secret](/guides/studio/destinations/reset-a-client-secret).
    </Warning>
  </Step>
</Steps>

Each registered application is listed with its name and **Client ID**, both copyable, and a **⋮** menu.

## What a consumer needs

| Value             | Where to find it                               |
| ----------------- | ---------------------------------------------- |
| **Version ID**    | The **Settings** tab of the destination        |
| **Client ID**     | On the application in the **Applications** tab |
| **Client secret** | Only at creation — store it then               |

See [Application authentication](/api-reference/authentication/application-token) for exchanging these for a token.

## How many you can register

Only **Multi-consumer** destinations accept several applications. **Dynamic**, **Static** and **Enterprise** destinations allow one, and **Add Application** is disabled with a tooltip once it exists. See [Destination types](/concepts/destination-types).

**Add Application** is also disabled while a publish or update is running.