What’s funny about this line (aside from how horribly awful and awkward it is to say “niggard” on stage despite its not being what it sounds like) is how full of questions Hamlet actually was. He asks them all kinds of questions about what they’re doing there, about the nature of their visit, who sent them and soon. So Rosencrantz is really spinning this out.
Did they make any demands? Barely. Hamlet ran their entire exchange. Rosencrantz seems to be lying to the King and Queen. Gutsy Rosencrantz.