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

# What is Somnia Domain Services (SDS)?

Somnia Domain Service is a decentralized domain layer on the Somnia Shannon Testnet.

It allows users to register human-readable, unique domain names like:

* <mark style="background-color:blue;">jack.som</mark>
* <mark style="background-color:blue;">lucy.som</mark>
* <mark style="background-color:blue;">bountyHunter123.som</mark>

These names are:

* 🌐 Fully on-chain and public
* 🧾 Unique and lowercase-normalized (no `JaCk.som` vs `jack.som` conflicts)
* 💰 Claimed by paying **1 STT** (native token) — directly to the contract

#### Why it matters

SDS can be integrated into any Somnia-based dApp:

* Games
* Messaging apps
* Wallets
* Social platforms

Any user who registers a `.som` name becomes uniquely identifiable across Somnia's ecosystem.

***

#### 4Example

| Traditional     | With SDS        |
| --------------- | --------------- |
| `0xA63f...91D7` | `king.som`      |
| `0x4Bf3...11AC` | `dao-admin.som` |

***

> Learn how to integrate SDS into your app using the SDK in the next section 👉