> For the complete documentation index, see [llms.txt](https://unter.gitbook.io/unter-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://unter.gitbook.io/unter-docs/welcome-to-unter.md).

# Welcome to Unter

Welcome to the official Unter documentation.

Unter is the **smart aggregator for crypto payments** — built to simplify, secure, and scale the way platforms accept crypto. Whether you're a developer, product manager, or business team member, this GitBook will guide you through everything you need to integrate and use Unter.

***

### What You’ll Find Here

* [**How Unter works**](/unter-docs/how-unter-works/smart-transaction-flow.md) — Understand the core mechanics of our smart transaction engine.
* [**Integration guides**](/unter-docs/documentation/quickstart.md) — Step-by-step instructions for the API setup.
* [**Product features**](/unter-docs/product-features/checkout-integration.md) — Checkout integration, Branding, supported chains and token configuration.
* **Best practices** — Tips to optimize user experience and performance.
* **Product roadmap** — A look at what’s coming next in future versions of Unter.

***

### Who This Is For

Unter is made for crypto-native platforms that want to provide better checkout experiences — from **gaming** and **ticketing**, to **e-commerce**, **donations**, **NFTs**, and more.

If you're looking to offer a **frictionless**, **multi-chain**, and **wallet-agnostic** payment flow to your users, you're in the right place.

## Get Started

{% content-ref url="/pages/KDlMxU0DlgksGuJ6XS6Y" %}
[Introduction](/unter-docs/introduction/what-is-unter.md)
{% endcontent-ref %}

{% content-ref url="/pages/6SsyWIZfUtMkrYjG3R1D" %}
[How Unter Works](/unter-docs/how-unter-works/smart-transaction-flow.md)
{% endcontent-ref %}

{% content-ref url="/pages/96zc1BFoWsJiMU5Oe0tW" %}
[Documentation](/unter-docs/documentation/quickstart.md)
{% endcontent-ref %}


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