NopCommerce API

Hello, I want to implement Android application for my website built on nop 3.60. Is there any plugin/extension or anything that can expose the information in the database as web services that can be consumed in the Android app? If no then is there any documentation specific to database structure that explains what information is stored in which tables?

See this free web service extension(plugin) as an example.   Search Extensions for others (that are probably not free).