> ## Documentation Index
> Fetch the complete documentation index at: https://help.elationhealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# The Message Thread Object

Message Thread is the heart of all messaging-related events inside Elation.

Every time a new message is sent in a chart, a Message Thread is created with its respective Thread Members (the sender and receiver(s)) and Thread Messages (beginning with the initial message itself).

Every time a reply is sent, a new Thread Message is created inside the Message Thread, and its new receivers (if any) are added as Thread Members as well.

## Working with message threads via the API

**Signing a message thread through the API requires the practice to have API document signing enabled.** See [Errors](/articles/rest/overview/errors#api-document-signing) for the exact error and how to request it.

## Field notes

* `members` is documented separately. See [The Thread Member Object](/articles/rest/messaging-api/thread-members/the-thread-member-object).
* `messages` is documented separately. See [The Thread Message Object](/articles/rest/messaging-api/thread-messages/the-thread-message-object).