I use Nextcloud as contact database. Last week I stumbled over the Subject REST API and got that this is a standard to get machine readable data over Internet. Now I got also that Nextcloud support REST
I'm not a developer but maybe you could add a Support for this standard to get contact into LibreOffice like it's possible for calc tables.
At the end not only nexcloud users could use it, also other Webdata could be used with this.
GraphQL is eating REST's lunch: http://graphql.org/
Maybe we should wait until Nextcloud supports it.
Do you think this enhancement makes sense?
REST standardizes just a way of communication, not the actual data.
So in general, it would be possible to have a REST data source, but it would need a concrete use case & description of the particular data that is provided via the REST.
I don't think anybody is going to work on this in the near future, and also not sure if nextcloud does or does not provide the user database via the REST, so closing as INVALID for the moment. Of course please feel free to reopen if you have more information about the access to the user database etc. - we can then provide code pointers for somebody to implement it (if anybody gets to that).