Semantic Scholar's search is pretty good, but there are also a variety of other (paid) projects that expand on its API. Look at tools like Scite and LitMaps for

Semantic Scholar's search is pretty good, but there are also a variety of other (paid) projects that expand on its API. Look at tools like Scite and LitMaps for what's possible with the semantic scholar dataset. As for coverage, I think it focuses more on the life sciences, but I'm not positive about that.