Download and install our SDK in your website or mobile app and set them up to send all necessary  information from your newsletter subscribers. 

 

To avoid duplicate contacts, we recommend using the ID parameter, which will be the subscriber's email address. 

 

Find more about our API references (here) and use the parameter's: Contact/Create. We recommend including the ID user by using the same parameter as the email address from the subscriber to avoid duplicated users and contacts. 

 

The more data you sent the better, we recommend at least sending this information: First Name, Last Name, Email, User ID and Newsletter subscription (true/false).