The tagline of the Times Open blog is "All the news that's fit to printf()", and that clever play on the paper's motto gains more credence with each new API released. In February the Times introduced the Newswire API, which "provides an up-to-the-minute stream of published items" from the paper of record, and the New York State Legislature API for tracking the political maneuverings in Albany.
ClinicalTrials.gov is a service of the U.S. National Institutes of Health. The site provides detailed information on all U.S. clinical trials currently underway. With the ClinicalTrials.gov API, the question “What recent clincial trials have examined garlic” can be answered. That’s right, garlic is a therapeutic agent under active research. This data repository contains data on trials of both pharmacueticals and dietary supplements.