Is there a reasonably priced service that provides an API for looking up financial data for public companies? There are quite a few services which provide access to quarterly filings etc, however I am looking for something that allows look ups by financial metric rather than downloading the whole statement. For example, being able to look up standard items like earnings, book value etc for a given company.
Something that essentially parses the corporate filings and makes it available as an API. Bonus points if the service is free(for low volumes) or has a low cost subscription plan.