# Reference App
source: https://developer.mastercard.com/ethoca-consumer-clarity-for-merchants/documentation/reference-app/index.md

## Overview {#overview}

The reference application guides you through the process of connecting your API to the Merchant Transaction API using JAVA. You will use the application and data provided to make calls to your API and return details about your company and specific transactions.

## Get the Source Code {#get-the-source-code}

The reference application is explained in-depth in the tutorial. You can also download a zip file of the source code.

|                                                                                    Item                                                                                     |                       Description                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------|
| [Reference Application Tutorial](https://developer.mastercard.com/ethoca-consumer-clarity-for-merchants/documentation/tutorials-and-guides/reference-app-tutorial/index.md) | An in-depth explanation of the reference app            |
| [merchant-api-demo.zip](https://static.developer.mastercard.com/content/ethoca-consumer-clarity-for-merchants/uploads/merchant-api-demo.zip) (69KB)                         | Downloadable reference application source code zip file |