Create an API key
Do this in Klaviyo, then paste the key into Notify Me.1
Open API keys
In Klaviyo, select your organization name in the lower left, then Settings → API keys.

2
Create a private API key
Under Private API Keys, choose Create Private API Key. Name it 
Notify Me.Choose Custom access. Give Write (full) access to Lists, Profiles, and Events. You can also give Write on Subscriptions so Notify Me can add the profile to your list.
3
Copy the key
Choose Create. Copy the key now. Klaviyo will not show it again. See Klaviyo: create a private API key.
Connect in Notify Me
1
Open Integrations
In Notify Me, choose Integrations in the left nav, then Connect on Klaviyo.
2
Paste the key and test
Paste the private API key and choose Test. When the test succeeds, pick the List.

3
Save
Choose Save. The Klaviyo card shows Active.
What syncs
Use those metric names in a Klaviyo flow. The profile also gets product properties such as title, URL, and variant.
Pause or disconnect
Choose Manage on the Klaviyo card.- Turn off Sync waitlist signups and alert events to pause without removing the key. The badge shows Inactive.
- Paste a new key and Test to replace the current key.
- Choose Disconnect to remove the connection.