[HakeHayashi]

Mm... PageRank is the basis, but then recent publications suggest they use a multitude of factors (probably 7-10+?) to evaluate sites. PageRank is still more-or-less the biggest chunk, but since people learned how to game it, they've had to likewise step up their internal game on ranking. What you're requesting probably comes off as a trade secret, but you could probably get reasonable results using a PageRank inspired hybrid

[ktpsns]

The pagerank algorithm is public and there exist a lot of implementations, for instance https://networkx.org/documentation/networkx-1.10/reference/g...

[tinus_hn]

I’m pretty sure it was patented at the beginning so it should be free by now