My Chinook JSON:API project is now in a good enough state that I feel comfortable hosting it on a live server. Here is the base url, https://chinook-jsonapi.herokuapp.com/, I highly recommend using some kind of JSON viewer if you want to interact with the API. If you are on a Chromium base browser then I recommend using JSON Viewer.
Remember, the API does not support filtering, pagination, sorting or include resolvers and it only supports READ operations. I’m hoping to add filtering soon but I first want to dedicate a blog post or two on building dynamic LINQ queries using expression trees. That should be fun!