> 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/atsdk.md).

# atSDK

- [atSDK Overview](https://docs.atsign.com/atsdk/sdk.md): Get to know Atsign's SDK, the atSDK
- [Get Started](https://docs.atsign.com/atsdk/sdk/get-started.md): Set up the atSDK for your preferred language
- [Authentication](https://docs.atsign.com/atsdk/sdk/onboarding.md): How to authenticate to an atServer
- [atKey Reference](https://docs.atsign.com/atsdk/sdk/atid-reference.md): Learn how to create atKeys for your chosen platform
- [CRUD Operations](https://docs.atsign.com/atsdk/sdk/crud-operations.md): How to do basic CRUD operations on an atServer
- [Notifications](https://docs.atsign.com/atsdk/sdk/events.md): How to send and receive real-time messages
- [Additional Features](https://docs.atsign.com/atsdk/sdk/synchronization.md): Implementation specific features to know about
- [Synchronization](https://docs.atsign.com/atsdk/sdk/synchronization/synchronization.md)
- [Connection Hooks](https://docs.atsign.com/atsdk/sdk/synchronization/connection-hooks.md)
- [atSDK Walkthroughs](https://docs.atsign.com/atsdk/atsdk-walkthroughs.md)
- [Dart atSDK Walkthrough](https://docs.atsign.com/atsdk/atsdk-walkthroughs/atsdk-tutorial.md): Get hands-on with the atSDK. Simple examples to kickstart your development.
- [Using the atSDK with Dart](https://docs.atsign.com/atsdk/atsdk-walkthroughs/atsdk-tutorial/using-the-atsdk-with-dart.md): Some very simple example of using the atSDK to get a feel for what it offers and create building blocks for your larger projects.
- [Get sample code](https://docs.atsign.com/atsdk/atsdk-walkthroughs/atsdk-tutorial/get-sample-code.md)
- [Cutting your Atsign keys](https://docs.atsign.com/atsdk/atsdk-walkthroughs/atsdk-tutorial/cutting-your-atsigns-keys.md): It takes two to tango!
- [Put and Get data asynchronously](https://docs.atsign.com/atsdk/atsdk-walkthroughs/atsdk-tutorial/put-and-get-data-asynchronously.md): You have mail!
- [Send and Receive data synchronously](https://docs.atsign.com/atsdk/atsdk-walkthroughs/atsdk-tutorial/send-and-receive-data-synchronously.md): Send me a txt!
- [Remote Procedure Calls (RPC)](https://docs.atsign.com/atsdk/atsdk-walkthroughs/atsdk-tutorial/rpc.md): spooky actions at a distance
- [atTalk - Encrypted chat client](https://docs.atsign.com/atsdk/atsdk-walkthroughs/atsdk-tutorial/attalk.md): Let's chat!