I’ve contact MC support and this is what they gave me: Due to the GDPR requirements for EU, we recently added a new way to delete contacts from your list. At this time, you can delete and archive (which is a soft delete and keeps that contact in your reports) or you can delete and … Read more
Based on the List Members Instance docs, the easiest way is to use a PUT request which according to the docs either “adds a new list member or updates the member if the email already exists on the list”. Furthermore apikey is definitely not part of the json schema and there’s no point in including … Read more
EDITED: Since posting this answer MailChimp has released version 2 & 3 of their API. Version 3 will be the only supported version starting in 2017. As soon as I have a chance to test it, I will update this answer for API version 3. MailChimp API v3.0 As per notification at the top of … Read more