# Download OAuth signing and Mastercard Encryption keys
source: https://developer.mastercard.com/account-catalog-services/tutorial/sandbox-access/step6/index.md

## Download OAuth signing and Mastercard Encryption keys {#download-oauth-signing-and-mastercard-encryption-keys}

1. From the **Creating your project** page, click **Download key file** . ![Download the key file](https://static.developer.mastercard.com/content/account-catalog-services/uploads/images/create-your-proj.PNG) Note: You must save the downloaded key file in a safe place.
2. Click **Open project** .  
   The project is created and the summary is displayed. ![Project summary](https://static.developer.mastercard.com/content/account-catalog-services/uploads/images/summary.PNG) Tip: Click **Add a new API to this project** if you want to add another Account Catalog Services API as per your business requirement. Repeat the steps to add the required APIs.

   It is recommended to create a single project for all the Account Catalog Services APIs that are relevant to your business case.