List ID:
You can find the List ID by clicking on the list in your ActiveCampaign account and checking the URL bar. It looks like this: /app/contacts/?listid=19&status=1
API URL:
You can find your API URL in your account on the "My Settings" page under the "Developer" tab.
API Key:
You can retrieve the API key as follows:
Send Data:
Send the name of the newsletter system, the List ID, and the API key to Sovendus.