NDBC THREDDS Server Catalog https://dods.ndbc.noaa.gov/thredds/catalog/data/stdmet/gpxa2/catalog.html

Dataset Size Last Modified
     Folder  gpxa2   --
         gpxa2h2021.nc 382.7 Kbytes 2021-08-31T23:59:00Z
         gpxa2h9999.nc 492.8 Kbytes 2021-09-16T07:33:00Z

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