# Download the OAuth Consumer key
source: https://developer.mastercard.com/account-catalog-services/tutorial/sandbox-access/step7/index.md

## Download the OAuth Consumer key {#download-the-oauth-consumer-key}

1. Navigate to **My Projects** and select your project.
2. Click **Sandbox credentials** .  
   The sandbox credentials are displayed. ![Sandbox credentials](https://static.developer.mastercard.com/content/account-catalog-services/uploads/images/sandbox-cred.PNG)
3. Go to the **OAuth 1.0a Project Key** section and copy the Consumer Key. You will need to use this while building the API request.
4. Refer to the [Reference app](https://developer.mastercard.com/account-catalog-services/documentation/reference-app/index.md) for the steps to build an API client and test Sandbox APIs. Refer to the [Sandbox testing](https://developer.mastercard.com/account-catalog-services/documentation/testing/index.md) for the test data available in the Sandbox environment.

Tip: To add more team members to your Sandbox project:

1. Navigate to **My Projects** and select your Sandbox project.
2. Click **Team**. The team details are displayed.
3. Click **Invite a Team Member**.
4. Enter the email address of the team member and click **Invite**.

Repeat the steps to add more team members.