Allow users to register to newsletters - API – Vega

To register to the newsletter, you can use the POST /api/Contacts endpoint. Usually, by doing the following:

(Only if needed) Get the Attributes from the GET /api/Attributes endpoint to get the proper values needed. For the Developer: The Attributes are business-level 'tags' that the organisation might want to be added to the Contact.
Compose the Contacts object and add the list of Attributes selected (if any). The JSON format is in the page given above.
Once the Contacts object has been created, send it to the POST /api/Contacts endpoint. This will either return an error (on failure) or the Contacts object (on success) with the new ID for it.
The domain for the endpoints is https://api.vega.works, so accessing the Contacts would be https://api.vega.works/api/Contacts.
It uses basic auth so you will need the API username and password from the organisation.

Allow users to register to newsletters - API