I’ve been working on a mobile application lately without access to any APIs, but do have access to the database creds. To make life easier I decided to create a REST generator to make this application plausible. As I build it out, if you find it useful, have fun with it: https://github.com/CoastalP47/drawbridge.
The premise is simple: insert your db creds and start the application. Using Express, a REST-like route structure is created based on the database schema with the options to populate relationships based on primary keys. It will grow over time but right now it’s small.