> For the complete documentation index, see [llms.txt](https://docs.atsign.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.atsign.com/dart-sdk/getting-started/our-packages.md).

# Our packages

Overview of our Dart packages published on pub.dev

Every Atsign package is published on pub.dev under the verified publisher [atsign.org](https://pub.dev/publishers/atsign.org/packages).

For our Flutter packges, check out [Our packages](/flutter-sdk/getting-started/our-packages.md) in the Flutter SDK

## Packages

Most packages require Dart 3.12.0 or newer.

<table><thead><tr><th width="157.84552001953125">Package name</th><th width="266.71875">Command</th><th>Description</th></tr></thead><tbody><tr><td>at_client</td><td><code>dart pub add at_client</code></td><td>The core SDK for Dart. Provides <code>AtClient</code>, <code>AtCollection</code>, <code>NotificationService</code>, <code>SyncService</code>, <code>EnrollmentService</code>, and <code>AtRpc</code>.</td></tr><tr><td>at_auth</td><td><code>dart pub add at_auth</code></td><td>For authentication and enrollment. <code>at_auth</code> is a transitive dependency of <code>at_client</code></td></tr><tr><td>at_chops</td><td><code>dart pub add at_chops</code></td><td>Cryptographic and hash operations (chops) that are repeatedly used across the Atsign Platform.</td></tr><tr><td>at_commons</td><td><code>dart pub add at_commons</code></td><td>The highest level package that contains common utility and library functions/variables.</td></tr><tr><td>at_cli_commons</td><td><code>dart pub add at_cli_commons</code></td><td>Contains ready-baked code and common patterns for Dart CLI applications.</td></tr></tbody></table>