My friend and I hacked an API to run background checks. We wanted to show it to the HN community and get your feedback on it. You can run 1 background check on yourself for free.
If you decide to run this service for longer than a demo, you should think long and hard about its social implications. You aren't building the Therac-25, but this sort of thing does definitely have the capability to deeply screw people over.
Be careful. Be thoughtful.