The Starfish Pardot Connector uses the pardot v3 API. See http://developer.pardot.com/ for more information
Where do I find my "API User Key"?
In Pardot, hover over the gear icon in the upper right corner of the screen, click settings and click the My Profile tab.
Please review the "Supported Search Criteria" page for the endpoint you are using. For example, for the Lists end point, view: http://developer.pardot.com/kb/api-version-3/lists/#supported-search-criteria.
Samples name filter. Note the absence of single or double quotes around the string.
name=Act-On Migration: Active All List - MAILABLE CONTACTS
Sample ID filter. There does not appear to be a way to say ID equals x. I'm also unsure if you can say greater than x and less than y to get a single ID. I just filter by name.