This work presents WAY-Z39.50, a system whose main goal is to provide adaptive access to digital libraries catalogues through Z39.50 servers. The system adapts gradually to the user depending on her interaction in two ways: different interfaces are created to try to improve the communication with the user and parallel searches in other servers are generated in order to save user’s time. As there can be users who are not familiar with this kind of adaptation, they can always decide not to let the system make any modification concerning both aspects.