# Integration Guide

Welcome to the Fiat24 Integration Guide! 

Discover everything you need to build with Fiat24 — from Smart Contracts to the RESTful API. With our tools and tutorials, developers can integrate seamlessly and unlock the full power of the Fiat24 Platform today!

This guide includes five parts:

* The **Part 1** gives the **solidity** developers fully details about how to communicate with our smart contracts in <mark style="color:purple;">**Arbitrum**</mark> blockchain.
* The **Part 2** includes various **RESTful APIs** which enable you to securely access and manage <mark style="color:purple;">**off-chain**</mark> Client accounts and data, design and customise your payment, cards, and Fiat24 account flows, and leverage our payments and banking infrastructure.
* The **Part 3** is to integrate the client onboarding process with external application. We also offer colour schemes for customise the look-and-feel.

<figure><img src="/files/1x6lVnVM9uRACM9MOrr3" alt=""><figcaption></figcaption></figure>

* The **Part 4** is optional. Projects can easily use our Dune reporting templates to build their own statistics.
* The **Part 5** is optional. Easily integrate the client services module into your project.

To integrate with Fiat24, you don't have to register with us. All interfaces are totally <mark style="color:purple;">**permission-less**</mark>.

{% hint style="warning" %}
We do **NOT** provide any Sandbox environment.
{% endhint %}


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