> For the complete documentation index, see [llms.txt](https://docs.xyo.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xyo.network/developers/sdk-reference/xl1-libraries.md).

# XL1 Libraries

Public npm libraries for XL1 chain access and React applications.

## `@xyo-network/xl1-sdk`

The main public XL1 library. Version `5.5.4` exposes network definitions, gateway construction, viewers, providers, transaction models, and finalized-block streaming through environment-aware exports. Its public peer contract uses the `7.4.x` XYO protocol SDK line.

```typescript
import {
  GatewayBuilder,
  MainNetwork,
  SequenceNetwork,
  finalizedBlockStreamFromGateway,
} from '@xyo-network/xl1-sdk'
```

Use SDK viewers through the gateway for chain reads. XL1 is not an EVM chain; do not substitute Ethereum RPC methods or Ethereum SDKs.

* [View `@xyo-network/xl1-sdk` on npm](https://www.npmjs.com/package/@xyo-network/xl1-sdk)

## `@xyo-network/xl1-react-client-sdk`

The public browser package for React client and wallet integration. Version `5.5.4` publishes a main browser export plus `client`, `model`, and `shared` subpaths.

```typescript
import '@xyo-network/xl1-react-client-sdk'
```

* [View `@xyo-network/xl1-react-client-sdk` on npm](https://www.npmjs.com/package/@xyo-network/xl1-react-client-sdk)

{% hint style="warning" %}
Build applications against the package's exported library APIs and documented entry points.
{% endhint %}


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