cURL
iMessage
Start or Stop Typing Indicators
Start or stop sending a typing indicator to an iMessage chat
POST
cURL
Technically, iCloud emails are supported… but their behavior is unpredictable.

Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Body
application/json
Recipient's iMessage address. Must be in E.164 format.
Example:
"+1234567890"
Whether to start or stop sending typing indicators
Available options:
start, stop Example:
"start"
Your leased iMessage number. If none is provided, we will use a random iMessage number of yours.
Example:
"+15555555555"