Find your Iterable API key by going to the Integrations tab in Iterable. Select API Keys from the drop-down:

From there, you can view existing API keys or add a new one:

To create a new API key (for a Preference Center in Push Planet), label it as “Email Preference Center” and select Standard (or Server-Side) type:

If you have any additional questions, or if you want to create an Iterable Email Preference Center, please contact us.