It's part of a side project for a friend, but I broke it out into its own thing: https://stackfinder.lilbot.xyz/
It searches across posts and tries to do a brief summary. It's not the prettiest, but it's better than a potato. I hope it's helpful for you!
Great tool there. Loving it!
This comment was deleted a year ago.
Re: substack data -- I'm using the bing api + scraping their articles as is. I'm not using textrank, but am using a home-rolled TF-IDF for summarizing.