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    Iocaine

    iocaine.madhouse-project.org · Personal blog · on HN since 2025

    Iocaine is a project site for software that serves garbage to aggressive AI crawlers, acting as a defensive tarpit for web servers.

    Visit blogHN submissions
    SecurityAI & Machine LearningOpen Source & Linux
    What HN says

    HN commenters recommend it as a way to fight back against AI crawlers, with one using it against Anthropic's aggressive bot.

    Stats for nerds
    18HN people shared it
    4linked in comments
    8story points
    Jul 2026last shared
    2025people per year2026

    Top posts on HN

    1. 1
      Iocane, The deadliest poison known to AI
      18 people · 8 points · first shared 2025 · 2 comments on HN

    What HN people wrote when they linked it

    • NitpickLawyerFeb 2026

      Title should be ...with Iocaine, and the project seems to be this one - https://iocaine.madhouse-project.org/

      > It is an aggressive defense mechanism that tries its best to take the blunt of the assault, serve them garbage, and keep them off of upstream resources.

      > It tries to poison them, so they’d go away forever in the long run.

      All I can say is that this is not how any of it works. These people think they're doing something but they have no idea how large scale training works, how data cleaning works, how synthetic data works, and so on. They won't "fool" anyone worth fooling, the bots will still scrape their sites, and so on.

      This seems to be a direct consequence of lots of people (even here on HN) constantly repeating a few memes like "regurgitating the training set", "ai bots crawl everything for training data", "we ran out of training data", etc. None of those are true. None of those matter in SotA models. Noone is training on raw scraped data anymore, and they haven't been doing it for 2-3 years. All the recent (1-2 years) gains in models have come from synthetic data + real world generated data (i.e. RL environments).

      This is a cute attempt, reminds me of the old tarpit concept from the 2000s, but it won't work, and it will just consume resources for whoever runs it, with 0 benefit downstream. If you want to do something about the crawlers, fix your serving. Don't do work on GETs, serve as much cached content as you can, filter them, even use anubis or the…

    • TwirrimAug 2025

      The only bot that bugs the crap out of me is Anthropic's one. They're the reason I set up a labyrinth using iocaine (https://iocaine.madhouse-project.org/). Their bot was absurdly aggressive, particularly with retries.

      It's probably trivial in the whole scheme of things, but I love that anthropic spent months making about 10rps against my stupid blog, getting markov chain responses generated from the text of Moby Dick. (looks like they haven't crawled my site for about a fortnight now)

    • godelskiJan 2026

      One of the most popular ones is Anubis. It uses a proof of work and can even do poisoning: https://anubis.techaro.lol/

      They even mention iocaine. I know, inconceivable!: https://iocaine.madhouse-project.org/

      There's also tons of HN posts on the topic with varying solutions:

      https://news.ycombinator.com/item?id=45935729

      https://news.ycombinator.com/item?id=45711094

      https://news.ycombinator.com/item?id=44142761

      https://news.ycombinator.com/item?id=44378127

    • GoblinSlayerDec 2025

      >Iocaine has served 38.16GB of garbage

      And what is the effect?

      I opened https://iocaine.madhouse-project.org/ and it gave the generated maze thinking I'm an AI :)

      >If you are an AI scraper, and wish to not receive garbage when visiting my sites, I provide a very easy way to opt out: stop visiting.

    • 458QxfC2z3Oct 2025

      See also:

      https://iocaine.madhouse-project.org/

      From the overview:

      "This software is not made for making the Crawlers go away. It is an aggressive defense mechanism that tries its best to take the blunt of the assault, serve them garbage, and keep them off of upstream resources. "

    • amaiMar 2025

      See also https://arstechnica.com/tech-policy/2025/01/ai-haters-build-tarpits-to-trap-and-trick-ai-scrapers-that-ignore-robots-txt/

      https://iocaine.madhouse-project.org/

      https://zadzmo.org/code/nepenthes/

      See also: https://tldr.nettime.org/@asrg/113867412641585520

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