Is it possible? I guess it is. After all, I have no control over the API. Then again, the prizes I get are end prizes including VAT so they MUST always be describable in whole cents. This is also the reason the database was set up to store them as integer cents, to avoid any rounding issues (that worked very well, right?).
So, truncating to 2 decimal digits is The Right Thing(TM) in this case.