# Integration and Testing
source: https://developer.mastercard.com/account-catalog-services/tutorial/api-testing/index.md

### Overview {#overview}

* This guide will walk you through the steps to test Account Catalog Services using the Sandbox (MTF) project.
* It is recommended to test the full functionality of the API in Sandbox (MTF) before moving to production.
* Create a project with Mastercard Developers. Before calling the API in Sandbox (MTF), work with your CIS Mastercard representative to get the `clientId` configuration completed for your CID within the API.

#### What you will learn {#what-you-will-learn}

* How to generate a client application using the [OpenAPI Generator](https://openapi-generator.tech/) that can send requests to the Account Catalog Services API.
* How to configure the client application with Sandbox keys created during project creation.
* How to integrate with Mastercard client libraries to sign requests and perform payload encryption.

Note: Account Catalog Services is only supported in Java.

#### Estimate the time to complete this tutorial {#estimate-the-time-to-complete-this-tutorial}

• 15 - 20 minutes.