Update: Marketing Email API is now live.
Announced: March 28, 2019
We’ve released a new API: the CMS Email API. This API will allow for the programmatic creation, manipulation, and retrieval of Marketing emails created in your HubSpot account. In addition, this API will give users the ability to programmatically obtain email send statistics from active and past email sends.
Note: This API can only create or update marketing emails for a user to send from within HubSpot. If you would like to programmatically send emails, please refer to the single send API.
The Marketing Email API and its associated endpoints are now live. You can access the new documentation here: Marketing Email Overview.
When is this happening?
This is currently live. Have questions? Check out this thread here.