NOAA/PSL Catalog http://psl.noaa.gov/thredds/catalog/Datasets/cpcsoil/catalog.html

Dataset Size Last Modified
     Folder  cpcsoil   --
         landmask.nc 524.6 Kbytes 2020-04-13T14:30:20Z
         landperc.nc 1.042 Mbytes 2020-04-13T14:30:20Z
         soilw.mon.1981-2010.ltm.v2.nc 3.243 Mbytes 2020-04-13T14:30:19Z
         soilw.mon.ltm.v2.nc 3.243 Mbytes 2020-04-13T14:30:19Z
         soilw.mon.mean.nc 232.0 Mbytes 2020-07-06T21:38:08Z
         soilw.mon.mean.v2.nc 232.0 Mbytes 2020-07-06T21:38:08Z

NOAA/PSL at NOAA PSL see Info
THREDDS Data Server [Version 4.6.15-SNAPSHOT - 2020-01-28T04:01:10+0000] Documentation