How to sync user’s email preference and subscribe, unsubscribe status to our own custom software platform.

Hey @Jason5680 

Maybe this will work, maybe it wont, but we wont know until we try, so here is what I suggest you try

I would first suggest creating a segment in Klaviyo based on ‘Updated email preferences’

• Now setup a flow which will be triggered by this segment
• add a webhook action to send the relevant data to your custom software platform.

Webhook setup:

• Set up an endpoint in your custom software platform that will receive the webhook data from Klaviyo. 
• In klaviyo flow - choose "Webhook" and enter the URL of your custom endpoint. Map the relevant data to be sent in the webhook payload. 

I hope this helps

Cheers

Arpit