Developer Features: search details
Make sure that you have enabled developer mode.
Use 
+ 
to open the main settings preference screen. Scroll down to the Search settings
preference catecory and switch on Search details.
For demonstration purposes we take the same search provider (Nominatim) and search term (Hauptstr 20, Heidelberg) as in the forward search section of the geocode feature.
Now double tap on the first search result entry … and you’ll get the full json data as answerd by the search provider:
