# Reference App
source: https://developer.mastercard.com/doconomy-aland-index/documentation/reference-app/index.md

The reference application shows how to use the Doconomy Aland Index API in the Sandbox environment. You can either re-use or take code references for implementation.
> To download the reference application, click
> [ReferenceApp_DoconomyAlandIndex.zip](https://static.developer.mastercard.com/content/doconomy-aland-index/uploads/ReferenceApp_DoconomyAlandIndex.zip) (19MB)

#### Pre-requisites {#pre-requisites}

* [Java 17](https://www.java.com/en/) and above installed.
* [IntelliJ IDEA](https://www.jetbrains.com/idea/) (or any other IDE of your choice).

#### Technologies Used {#technologies-used}

* [Spring Boot](https://spring.io/projects/spring-boot)
* [Apache Maven](https://maven.apache.org/)
* [OpenAPI Generator](https://openapi-generator.tech/)

#### How to Use {#how-to-use}

1. Download and import the application into your IDE.
2. In the root directory of the application, go to the **README.md** file and follow the steps mentioned under the **Configuration** section to configure and run the application.