NOAA/ESRL/PSD Catalog http://www.esrl.noaa.gov/psd/thredds/catalog/Datasets/gpcp/catalog.html

Dataset Size Last Modified
     Folder  gpcp   --
         precip.mon.1981-2010.ltm.nc 751.9 Kbytes 2016-11-08T21:40:17Z
         precip.mon.ltm.nc 751.9 Kbytes 2016-11-08T21:40:17Z
         precip.mon.mean.error.nc 14.95 Mbytes 2016-12-16T21:49:20Z
         precip.mon.mean.nc 15.44 Mbytes 2016-12-16T21:49:10Z
         Folder  v2.2/   --

NOAA/ESRL/PSD at NOAA ESRL PSD see Info
THREDDS Data Server [Version 4.3.15 - 20121218.1126] Documentation