API to classify location as urban, suburban, or rural

I'm trying to classify colleges as having a urban/suburban/rural location. I can't seem to find any websites that classify colleges in these categories (odd, right?). So I was thinking of using the location of the school to classify the college as urban/suburban/rural. Are there any apis or even websites (where I would have to use web scraping) that could classify a location as urban/suburban/rural?