On the documentation page, the example: http://crime.chicagotribune.com/api/1.0-beta1/crime/?format=jsonp&limit=1&community_area=10&crime_date__gte=2012-01-01 doesn't work. Removing an underscore fixes the issue: http://crime.chicagotribune.com/api/1.0-beta1/crime/?format=jsonp&limit=1&community_area=10&crime_date_gte=2012-01-01