The Brains

The Brains is a directory of MCP servers built from the public thinking of founders, CEOs and investors. Each entry, called a brain, packages one person's talks, essays, interviews and posts into a searchable server that you can add to an AI client. The site describes the collection as "the smartest brains on earth, in an MCP," and at the time of writing lists 39 brains backed by 8,154 cited sources. You use it by asking a question inside Claude, Cursor, ChatGPT or Codex, such as how Pieter Levels prices a product or what Paul Graham says about fundraising, and the brain answers from that person's own recorded material. The problem it addresses is one of access. The most useful operator advice is rarely in a single document. It is spread across hours of podcast audio, long essay archives, interview transcripts and years of social posts, and finding the specific passage where someone explained a pricing decision or a hiring rule means searching several platforms by hand. General purpose AI assistants smooth those distinctions away: they blend sources, and often they do not tell you where an answer came from. The Brains keeps the material organized per person and keeps the attribution attached to each answer, so you can check the reasoning against the original talk, essay or post rather than trusting a summary. Each brain is presented as its own server with a short profile. The listing shows the person's role and a one-line description of what they built, how many installs the brain has, how many talks and essays and posts are included, and when the brain was last updated. Alex Hormozi's brain, for example, is described as the co-founder of Acquisition.com who built Gym Launch by licensing his gym playbook, with 85 installs, 28 talks and essays, 248 posts and an update seven days prior. Jason Cohen's listing notes 221 talks and essays and 300 posts, while Paul Graham's shows 45 talks and essays and 370 posts. Those counts matter because they tell you how much material sits behind an answer before you install anything. Citation is the defining capability. The site states that every answer cites the talk, essay or post it came from, and the Product Hunt description adds that each answer quotes the source with a link. That means a reply is not just a synthesized opinion but a pointer back to the exact piece of public thinking being drawn on. If you are quoting a founder in a memo, comparing two operators' views on the same topic, or checking whether you remembered a piece of advice correctly, the citation is what makes the answer usable. The description on the site is blunt about this: "Every answer cited." Brains plug into assistants people already use. The site names Claude, Cursor and ChatGPT as the clients you add a brain to, and the Product Hunt description also lists Codex. Setup is described as a single URL per brain, or one URL that covers all of them, so you can install one person's thinking or the whole collection. Because the product is delivered as MCP servers rather than as a standalone chat app, it works inside the tools where founders already draft code, write documents and ask research questions, instead of adding another tab to check. The directory is built for browsing. A search box lets you look up founders or topics, with "pricing" offered as an example query. Filters separate the brains into groups: all, indie hackers (29), AI builders (16), CEOs (16), investors (7), marketers (26), operators (11), health (2) and thinkers (1). Sorting options include most installed, most sources, recently updated and A to Z. The combination lets you narrow by the kind of operator you want to hear from, then order the results by the brains with the deepest archives or the freshest material. Every profile also ships with a suggested question, which shows the kind of thing the brain is good for. Naval Ravikant's reads "I'm a well-paid consultant. How do I stop trading hours for money?"; Marc Lou's asks "What is the smallest version of my startup I could launch this week?"; Greg Isenberg's asks "I can build an app in a weekend. How do I get people to care about it?" These prompts double as examples of scope: the brains are aimed at concrete operating questions, not general trivia. A consumer example sits alongside them, such as Andrew Huberman's question about what to do in the morning and evening to fall asleep easier. Two lightweight community flows sit at the end of the directory. A "Who should be next?" section invites visitors to request a founder, CEO or investor by email, with the note that the most-requested brains get built first. A separate "Are you on here?" section invites the people who have been turned into brains to claim their entry, verify it, fix anything the builders got wrong and add sources. The Product Hunt listing describes the project as unofficial and not affiliated with the people featured, which is why the claim flow exists. The approach is deliberate about scale and boundaries. Rather than training one large model on everything, The Brains builds a separate server per person from material that is already public, and routes each question to the brain you chose. The Product Hunt description says the project is free and open source under the MIT license, with 37 brains at the time of that listing, while the site's own counter shows 39 brains and 8,154 cited sources. The result sits somewhere between a search engine and a panel of advisors: narrow enough that an answer belongs to one person, broad enough that the collection covers indie hacking, AI building, executive leadership, investing, marketing, operations, health and philosophy. For users, the payoff is traceability and speed. Instead of listening to a two-hour interview to find one passage about raising prices, you ask the question and follow the citation if you want the full context. Because answers carry quotes and links, they can be dropped into a decision memo, a board update or a research doc without losing the thread back to the source. And because the collection spans dozens of people, comparing how different operators answer the same question becomes a matter of switching brains rather than rebuilding a research process from scratch. The suggested questions sketch the use cases. Founders use the brains for pricing and offer decisions (Alex Hormozi, Rob Walling), for deciding whether an idea has demand before building (Pieter Levels, Tibo Louis-Lucas, Yahia Bakour), and for launching the smallest possible version of a product (Marc Lou). Marketers ask about growing a LinkedIn audience from zero (Justin Welsh, Ruben Hassid), organic short-form video downloads (Jack Friks), influencer conversion (Blake Anderson, Zach Yadegari) and cold outreach replies (Romàn Czerny). Investors and executives ask Jason Calacanis how to make first angel investments, Alexandr Wang how to keep the hiring bar high, and Shaan Puri how to position a product in a crowded market. The audience is founders, indie hackers, solo operators, marketers, investors and anyone who treats public operator writing as a working reference. Categories like indie hackers and AI builders make that explicit. The integrations are the AI clients named on the site and in the listing: Claude, Cursor, ChatGPT and Codex. Pricing is stated as free, the code is open source under MIT, and the project is described as unofficial and unaffiliated with the people whose material it indexes. In short, The Brains turns public founder and investor material into individually installable MCP servers that answer questions with citations. It is free, open source and built for people who want a specific person's reasoning rather than a blended summary, delivered inside the AI tools they already use.