The Visitor API requires the Affinity and Affinity Group add-ons for the Frosmo Platform. To get the add-ons, if you do not already have them, contact Frosmo support.
The Visitor API allows you to retrieve visitor affinity data from the Frosmo back end.
For an introduction to visitor affinity and affinity groups, see Feature: Affinity and Feature: Affinity group.
