Search API not working-ish

Hey all,

I am trying to write a script to grab all of the "Applications" out of the CMDB.  I'm using the search URI of

"/configuration_items.json?type_id=409402"  ( I verified that is the number for the value of the applications.)  I get zero results. 

I can get results when doing other searches, like "/configuration_items.json?asset_tag=CIID400213963714", but that only works on CIs like users.

Is there a trick to searching for applications?