Ask HN: How should I validate my tech-hiring MVP?

I've been holding on to an MVP that I created earlier this year but never even started marketing. The project is completely unvalidated, so that's one mistake. It's hard to tell if this is something anyone actually wants.

It's https://www.sookiestack.com/ - basically a way of automating the process of assigning and keeping track of take-home coding and design challenges (automatically creates a github repo for each candidate). Ideally it will cut down on the amount of time spent on this process.

I've considered doing a lot of cold emailing to see if I can get anyone to try it, but it would be better to get someone in my network to test it out and give feedback - see if it's useful for them. The problem is, my network kind of sucks.

Does anyone around here have any ideas of how I can get some beta users and start to validate the concept? Even better - if anyone is interested in beta testing (for free of course), it would help a lot.