MailBluster Developer API is not designed for sending and receiving emails, i.e. Bulk emailing. However, MailBluster Developer API allows to control your leads, managing products, and ecommerce activities from outside of your MailBluster account.
The API is specifically designed to control Leads, Fields, Products and Orders.
In simple words, the Developer API is designed to collect leads from the client’s website. It is not capable of sending emails.
For further details on MailBluster Developers API, please visit: https://app.mailbluster.com/api-doc.