I'd like to read and write data to a published Google spreadsheet via the GDATA API, but I don't want my app to be authenticated with full Spreadsheet authorization (giving it full access to that user's docs).
It seems that it is not possible according to the official documentation.
The documentation does not indicate if it is possible to restrict the scope of authentication OAuth2 : http(s)://spreadsheets.google.com/feeds/
.