Track same user for two domains with new klaviyo object

​Hi @web!

The task you’re describing can be challenging - but I can definitely provide some resources and direction. Also - I would keep in mind that this constitutes a custom use case, so there is only so much guidance that Community and/or Support can offer.

For starters, this Community thread gives a pretty good idea of the how to accomplish this:

You will essentially have to grab the exchange ID from the cookie in the first domain, then use the following API endpoint to exchange that for the Profile ID, which you can use to identify the profile on the next domain:

• https://developers.klaviyo.com/en/v1-2/reference/exchange 

The exchange ID is stored within the cookie, and you can test this behavior by following these steps (after cookie-ing yourself):

• in chrome, right click > inspect
• locate the network tab in the window that just opened
• look for the "track" network call in the list and click "payload" and find the one that has _activity__  in it

It will look something like this:

​

You can retrieve and decode the cookie programmatically by implementing the solution from the aforementioned community post, specifically this script:

_learnq.push(["_getIdentifiers"]).$exchange_id

Since this can warrant extensive custom development, you’re always welcome to reach out to one of our wonderful Official Klaviyo Partners for further help.

I hope this helps to get you started, and thanks for using the Community!

- Brian