I actually saw this posted on Reddit earlier and was super impressed! Glad to see it here posted as well :) I was silently wondering if you were aggregating MLS data.

I run SimplyRETS[0] - we provide a normalized API to MLS's RETS data. I'm not trying to sell you anything, but I'd love to team up - You should shoot me an email (cody@simplyrets.com)!

Best of luck and great work on the product!

[0] - https://simplyrets.com