Is there any way to add a contact with a duplicate email address via the API and override the 409 - Conflict? Basically I want to force it to add anyway even if it thinks it is a duplicate.
Possible at all?
Unfortunately it is not possible to intentionally add duplicate contacts though the API. It is an intentional design decision to limit this via the API and there is not currently any plan to change that behavior for the V2 API. Having said that, it may be possible to accomplish this with the next major update to our APIs.