The application Grants4Companies was recently introduced in the Austrian Federal Business Portal (Unternehmensserviceportal, USP). The productive application displays a list of business grants which apply to a business depending on the data available about this business in the systems of Austrian public administration. In this article we describe the underlying Proof of Concept implementation, used to experiment with and test new features. This PoC implementation is written in Common Lisp, interfaces with a Prolog-reasoner, and makes use of formalised grant descriptions based on S-expressions.