I've bookmarked so much it doesn't mean anything anymore. I tried a few years ago to index it all, but with the rate limiting that went nowhere. I should probably revisit pulling it all out of the common crawl now that I think about it. Or perhaps someone knows of some mirrors?
Did you try the HackerNews API? [0].
I've never used it, but it states in the README that there is no rate limit currently (~8 months ago).