# Contact Finder with REST API

This document demonstrates how you can easily integrate any third-party REST API service with iX Hello and build custom apps that use the API service as data source. 

{% content-ref url="contact-finder-with-rest-api/prerequisites" %}
[prerequisites](https://docs.ixhello.com/ixhc/general/use-cases/contact-finder-with-rest-api/prerequisites)
{% endcontent-ref %}

{% content-ref url="contact-finder-with-rest-api/build-custom-app" %}
[build-custom-app](https://docs.ixhello.com/ixhc/general/use-cases/contact-finder-with-rest-api/build-custom-app)
{% endcontent-ref %}