It's intensely slow too. I just fed it top 10 female names of the 70s and 80s and it got about 30%. It's wrong, slow, and broken. Not a good start.
ab -n 100 -c 5 http://api.genderize.io/\?name\=Cameron ab -n 100 -c 5 http://genderizer.herokuapp.com/\?name\=CameronHeroku's free tier, not nearly as overloaded right now, but still. Source here: https://github.com/rajington/genderizer