When I plan a tour, I cross the data of a way and some points of interests, included the places to sleep. To do that, I search some contacts in warmshowers website off course ;)
But I have to do a lot of Ctlr-C-Ctlr-V to import the informations in a Umap-map.
I will love the feature of export a list of warmshowers members able to be shared with other apps.
Or something like an API ;)