Now that ArcGIS Online supports adding OGC Items it would be useful to extend that support to the Open Data sites.
OGC WMS and WFS are supported in Open Data https://blogs.esri.com/esri/arcgis/2014/07/11/argis-open-data-production/
Open Data only shows the OGC Endpoints of ArcGIS Server Services. It does not let me index, serve, query or preview pure OGC datasets server from non-ArcGIS Server web services like ArcGIS Online now supports.
What’s New with OGC Support in ArcGIS Online (June 2016) | ArcGIS Blog
This is something that Socrata does support and open data is lagging behind.
Mark provided the documentation on how we will implement working with OGC Services. We have no plans to support OGC Services as input and generating downloads from them.
Retrieving data ...