yikes! The docs had an overhaul last week, that link was removed as part of the overhaul. Should have paid more attention. Should be fixed now :)
> A one-sentence describing exactly what it does and how it works would help ;-)
Here goes nothing:
mCaptcha is a privacy-focused, highly accessible CAPTCHA that uses Proof of Work for rate-limiting. It makes the bot/spam spend more time and work sending the request than it takes for the server to respond.
I'm the author of mCaptcha. I'd be happy to answer any questions you might have :)
For context, mCaptcha was discussed in these threads in the past hour before being posted on here: [0]: https://news.ycombinator.com/item?id=32339922 [1]: https://news.ycombinator.com/item?id=32340424 [2]: https://news.ycombinator.com/item?id=32340305