Hello,
In order to insert the Constant Contact contactId into the body of an email, you would need to retrieve the contactId and then add it as a Custom Field within the contact in order to use it as part of a Dynamic Link. We don't currently offer a way to insert the contactId directly into an email campaign.
Bulk Activities - Export Contacts Endpoint https://v2.developer.constantcontact.com/docs/bulk_activities_api/bulk-activities-export-contacts.html
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Hello @MJ313,
Thank you for reaching out to Constant Contact's API Support.
Currently neither version of our API has access to A/B emails. It will be adding to the v3 API; however I do not have a release date for this feature yet.
The tracking summary will be released for the v3 API. The release date is also not yet available, but you can keep an eye on our v3 Release Notes for when we add new endpoints and updates.
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