The Cluster Active Archive (CAA) (URL: http://caa.estec.esa.int) contains the entire set of Cluster high-resolution data in a standard format and with a complete set of metadata in machine readable format. The data archive is publicly accessible and suitable for science use and publication by the world-wide scientific community. This talks provides an overview of the CAA database and services. The coverage and range of products in the CAA are being continually improved with more than 200 datasets available from each spacecraft, including high-resolution magnetic and electric DC fields and wave spectra; full 3-dimensional electron and ion distribution functions from a few eV to hundreds of keV; and various ancillary and browse products to help with spacecraft and event location. The CAA became operational in February 2006 and has currently about 800 registered users. The CAA has data from most of the Cluster instruments for at least the first five years of operations (2001-2005), and before summer 2009 the data content should cover years 2001-7. The total amount of the CAA data files in compressed format is expected to exceed 50 TB.