I'm working on setting up the back-in-stock subscription feature on Klaviyo. I'm planning to transfer all current subscriptions from the existing system to Klaviyo. Is there a way to do this, such as uploading an XML or CSV file directly to Klaviyo, or using a bulk API accepts for an example 1000 subscriptions per request?
Yes, you can do this with a csv upload or API calls.
If it’s a one-off import, then just a CSV import to a list is by far the easiest way. Have a look at https://help.klaviyo.com/hc/en-us/articles/1260806293150
If there’s going to be ongoing sign-ups using code on your site which you then import to Klaviyo, then go the API route. Have a look at https://developers.klaviyo.com/en/reference/subscribe_profiles as a possible starting point.
I’ve done both, the first is easy, the second just requires a bit of integration + edit access to your underlying site so you can invoke the API call when someone subs in. I have to update my integration to bring this into line with the newer API so if you go this route make sure you’re referring to the latest dox.
HTH,
G
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