> For the complete documentation index, see [llms.txt](https://devcenter.unico.io/unico-idcloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://devcenter.unico.io/unico-idcloud/by-client-integration/introduction.md).

# Introduction

The **by Client** is the IDCloud platform's integration channel that offers total flexibility for identity validation. It is designed for direct integration with the client's back-end, allowing complete control over the user experience (UX). The user interface (front-end) can be implemented in two ways:

* **Proprietary Front-end**: Respecting the "Capture Standard" expected by the platform.
* **SDKs**: Using the SDKs provided by IDCloud.

This channel allows the client to combine and use the following platform capabilities, according to their needs:

* Liveness Detection,
* Identity Verification,
* Behavior Alert,
* Risk Score,
* Document Capture and Reuse,
* Return of the Serpro Similarity Score.

{% hint style="info" %}
Change hint type To use "by Client", your API Keys must be previously configured with the capabilities you wish to consume.
{% endhint %}

> "by Client" also supports processing existing face databases. To enable this functionality, please contact your account manager.


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