I'm not talking about adding addresses to OSM. I'm talking about resolving features based on address. "Give me the building at address (____), because I know that's a business and I can fill in additional information."
I quickly found this: https://wiki.openstreetmap.org/wiki/Nominatim
E.g.: https://nominatim.openstreetmap.org/ui/search.html?q=pilking...
See https://www.openstreetmap.org/#map=19/50.07298/19.93528 where it is mapped at least in a small part.
> then I could easily write some scrappers to help out with filling in other data.
Note that it may not possible due to copyright issues