https://vocabs.sshopencloud.eu/vocabularies/ is the reserved namespace for hosted vocabularies (refering to skos:conceptScheme/skos:concept) that do not have their own namespace. This does include newly created vocabularies but also vocabularies from places without a dedicated namespace, e.g., they didn't have a SKOS expression and no public URIs like collection of concepts in a spreadsheet.

The data in this namespace lives in a triple store and can be browsed with the help of Skosmos at https://vocabs.sshopencloud.eu/browse/. Concpets from vocabularies of this namespace are resolved against the browse-service to show them in a web-version. There is also the possibility to use the API of Skosmos, please have a look at the information pages of the browse-service.