Last updated: 2019-02-05
Works with CiviCRM 4.3. It might not be supported anymore.
The entity for the E-mail API is Email and the action is Send. Parameters for the api are specified below:
- contact_id: contact which will receive the e-mail
- template_id: ID of the message template which will be used in the API.
It is not possible to specify your own message through the API.