# DAI use case: Instanciate an onboarded MEC application
This section describes a use case that the user can accomplish using the Device application interface API of MEC Sandbox from a User application.
Objective:
* As a user application runing on a terminal (e.g. an intelligent traffic light), I need to get the list of the available onboarded MEC applications (e.g. a PingPong MEC application).
* Having a list of the available onboarded MEC applications, I want to instanciate one of them, such as PingPong MEC application
*See [user interface](../Sandbox-User-Interface#mec-sandbox-wireframe) for frontend details*
| Operation | Notes |
| --------- | ------ |
| 1. Log-in on the Sandbox landing page with access credentials & go to the User Sandbox area | _See [frontend](../Sandbox-User-Interface#sbox03)_ |
| 2. Select the DAI network scenario `4g-5g-macro-dai` to deploy in the user sandbox. <br><br> _See [relevant scenario](./macro-networks.md#macro-network-4g-5g-dai) for more details_ | _See [frontend](../Sandbox-User-Interface#sbox04)_ |
| 3. Find the DAI Information Service URL endpoints & configure them into the MEC application or environment | _See [frontend](../Sandbox-User-Interface#sbox05a)_ |
