Klaviyo - Getting your public API key
Log in to your Klaviyo account and access your Settings.
Under Account, access API keys.
Copy the value you find under Public API Key:

Klaviyo
Omnisend
Recharge
Log in to your Klaviyo account and access your Settings.
Under Account, access API keys.
Copy the value you find under Public API Key:

Klaviyo
Omnisend
Recharge