Hello Martin

Thanks for this inspiring map. It makes me happy to see that others have a similar focus.

Maybe the Suspended Coffee Concept is interessing for you. You can find a source with many places at this website https://suspendedcoffees.com/cafes/ I don’t know if they have an open api.

An other project is https://www.pumpipumpe.ch/ for free sharing of household items. I also don’t know if they have an open api.

I created a map that shows free facility and offers based on OSM data: https://priceless.zottelig.ch
Over the info button (i) you can find the OSM tags and the overpass query I use. Perhaps there is something that matches your focus.

Best regards,

Markus