Add Contacts to Lists (Bulk)
documentedBulk add contacts to one or more lists via an asynchronous activity.
POST /activities/add_list_membershipsContact Listsno implementation yet0 runsInput
contact_id_1*
Source Contact ID 1
Enter a contact_id
contact_id_2
Source Contact ID 2
Enter a second contact_id
list_id_1*
Destination List ID 1
Enter a destination list_id
list_id_2
Destination List ID 2
Enter another destination list_id
Calls Constant Contact as you (your API key is your account); keychains.dev holds the credentials.