This was with a great pleasure that, few weeks ago, I received an email complaining about a bug in the API. It is not everyday that one is happy about a bug report!
The report was from Daniel O'Neil, a researcher at the Georgia Institute of Technology. He is using the Cheméo API to experiment with machine learning algorithms to predict properties of compounds. I was really pleased with this use of the API, as I was doing my PhD, it was always a problem to access data in an easy to use format. This is great to see that my work is making the life of researchers easier.
You too can use the Cheméo API, it is available for free.