The following pages are tagged with list_membership

How to Add Contacts to Lists How to add large numbers of contacts to lists using bulk activity endpoints
Add Tags to Contacts Bulk Activity Add one or more tags too multiple contacts.
Contact Subresources The Contact resource now includes subresources for payload flexibility.
What's New in the V3 API What’s New The Constant Contact V3 API is a complete rebuild of our API in every sense. It has improved performance and reliability, and contact functionality is the same as users experience using Constant Contact. The V3 API is a REST-ful API that uses JavaScript Object Notation (JSON) payloads...
Remove Contacts from Lists Bulk Activity How to remove large numbers of contacts from lists using a bulk activity endpoint
Remove Tags from Contacts Bulk Activity Remove tags from a large number of contacts.