NDBC THREDDS Server Catalog https://dods.ndbc.noaa.gov/thredds/catalog/data/stdmet/slpl1/catalog.html

Dataset Size Last Modified
     Folder  slpl1   --
         slpl1.ncml 302.0 bytes 2017-11-15T16:15:20.148Z
         slpl1h2004.nc 90.24 Kbytes 2004-12-31T22:00:00Z
         slpl1h2005.nc 158.3 Kbytes 2005-10-01T17:00:00Z

National Data Buoy Center THREDDS Server at National Data Buoy Center see Info
THREDDS Data Server [Version 4.6.14 - 2019-07-23T11:04:31-0600] Documentation