How to connect
SourceMedium connects to Klaviyo with a read-only API key that you create in Klaviyo and paste into SourceMedium.Sign in to SourceMedium, open your store, then choose Data sources → Connect data source and select the platform. You need an Admin or Editor workspace role.After you connect explains the first sync and connection statuses.
1
Create a read-only API key in Klaviyo
In Klaviyo, go to Settings → API Keys and click Create Private API Key. Label it SourceMedium and set its access level to Read-Only Key. See Klaviyo’s guide: Manage your account’s API keys. If that link has moved, search the Klaviyo help center for “API keys”.Klaviyo private keys default to full access, so choose the read-only scope deliberately. A key’s scope cannot be edited afterwards: to change it you delete the key and create a new one.
2
Add the key in SourceMedium
Find Klaviyo in the connector picker and click Connect. Paste your private API key and click Connect.
3
Confirm it is connected
SourceMedium checks the key with Klaviyo before saving it, so a wrong key is rejected on the spot. If it is rejected, confirm it is the read-only key you just created. The connection reads Awaiting first data until the first sync lands, then Connected.
SourceMedium only ever reads from your connected platforms. It does not create, change, or delete anything, so create the key with read-only access wherever the platform offers it. Treat it like a password: keep it confidential and avoid sharing it over email or in spreadsheets. If the credential is rotated or revoked, follow this guide’s connection method to update SourceMedium.