# Build an end-to-end application
source: https://developer.mastercard.com/account-catalog-services/tutorial/build-end-to-end-app/index.md

This tutorial helps you to create a simple Java application that makes an API call to the Account Catalog Services API in the Sandbox (MTF) environment.

**What you will learn**

* How to set up the environment to develop a simple Java application
* How to perform [payload encryption](https://developer.mastercard.com/platform/documentation/security-and-authentication/securing-sensitive-data-using-payload-encryption/#jwe-encryption)
* How to make an API call