Hacker News Reader

How does the engine determine open source?

I checked a paper, 10.1097/RHU.0000000000000563 for example; which I know for a fact is open-source marked as non open source.

Otherwise, very nice tool. Will be using this regularly. Awesome stuff.

For that I use the Unpaywall API:

According to them it's closed but I definitely see it as open here:

I'll look to see if I can find another data source for OA papers to add more coverage.