# Reference App
source: https://developer.mastercard.com/transaction-notifications/documentation/developer-tooling/reference-app/index.md

## Overview {#overview}

This reference application provides you with a fully working code. All you need to do is to plugin
your credentials, and you will be able to run the code and learn how to integrate with Transaction Notifications API.

## How To Get It {#how-to-get-it}

The sample app is very easy to use and follows the same instructions and
steps in the [tutorials](https://developer.mastercard.com/transaction-notifications/documentation/tutorials/index.md).

The sample code can be referred from here:

* Java: [tn-java-ref-app.zip](https://static.developer.mastercard.com/content/transaction-notifications/uploads/tn-java-ref-app.zip) (231KB)
* Python: [tn-python-ref-app.zip](https://static.developer.mastercard.com/content/transaction-notifications/uploads/tn-python-ref-app.zip) (7KB)

## How To Run {#how-to-run}

Follow the instructions in the README.md to build and run the reference app.