Ask HN: Interested in a Collaborative filtering API?

Is anyone interest in a Collaborative filtering API? My friend and I have been thinking about wrapping up what we have in an API. We have basically the Netflix algorithm for anything people rate.

The two possible's we've tossed around are:

- an api that you have to submit all rates in your database to.

- an api that connect to your database.

Both have big trades offs that we haven't been able to work around.