# Reference App
source: https://developer.mastercard.com/account-to-account-commerce-for-dsp/documentation/reference-app/index.md

**Overview**   

The reference application is a simple Spring Boot application that shows a typical usage of the Account to Account Commerce and how to integrate different operations in the sandbox environment. You can either re-use or take code references for your implementation.   

**What you will learn**
> * How to use the reference application
> * How to configure your application for the sandbox and production environments
> * How to test your application

**Reference Application Code**   


This reference application illustrates connecting to the Account to Account Commerce platform's sandbox environment APIs. You can download and understand the endpoints and how they operate together by running the test cases.   
> Download the reference app, by clicking [atoac-reference-app.zip.](https://static.developer.mastercard.com/content/account-to-account-commerce-for-dsp/uploads/atoac-reference-app.zip)
Once downloaded, unzip it, navigate to the project folder `atoac-reference-app` and follow the README.md file for further instructions.

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This reference application illustrates connecting to the Information Exchange Service platform's sandbox environment APIs. You can download and understand the endpoints and how they operate together by running the test cases.   
> Download the reference app, by clicking [a2a-ar-reference-app.zip.](https://static.developer.mastercard.com/content/account-to-account-commerce-for-dsp/uploads/a2a-ar-reference-app.zip)
Once downloaded, unzip it, navigate to the project folder `a2a-ar-reference-app`, and follow README.md file for further instructions. Note: The reference application is built for reference purposes only. Your production application does not need to function the same way.