> For the complete documentation index, see [llms.txt](https://lfdocs.lookingglassfactory.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lfdocs.lookingglassfactory.com/legacy/legacy-software/corejs/api.md).

# API

Overview description of the functionality of Client, Message, and functionality related to communication with HoloPlay Service.

* [HoloPlayCore.Client](/legacy/legacy-software/corejs/api/client.md) — A class representing a client to communicate with HoloPlay Service.
* [HoloPlayCore.Message](/legacy/legacy-software/corejs/api/message.md) — A class to represent messages being sent over to HoloPlay Service.
* [HoloPlay Service Related](/legacy/legacy-software/corejs/api/hops-related.md) — Further information on HoloPlay Service related fields, quilt settings, and error codes.