The Brains

The Brains is a directory of MCP servers that turn well-known founders, CEOs, investors and other public thinkers into searchable knowledge sources for AI assistants. Each brain is built from that person's public talks, essays, interviews and posts, and can be added to Claude, Cursor, ChatGPT or Codex. The site describes itself as the smartest brains on earth, in an MCP, and its stated purpose is straightforward: when you ask an AI assistant a question about pricing, fundraising, launching or growth, the answer should come back with a citation pointing to the talk, essay or post it was drawn from. The directory currently lists 39 brains covering 8,154 cited sources, spanning indie hackers, AI builders, CEOs, investors, marketers, operators, health experts and thinkers. Business and startup advice is abundant but scattered. A founder who wants to know how Pieter Levels prices a product, what Paul Graham says about fundraising, or how Ryan Hoover launched Product Hunt would otherwise have to search across podcasts, newsletters, essays and social posts, then hope the assistant remembers the source correctly. The Brains gathers those public materials into a single searchable unit per person and exposes it as an MCP server that plugs into the assistant the user already works in. That moves research into the tool instead of across a dozen browser tabs. The citation requirement matters because advice from public figures is easy to misattribute, and every answer is tied back to a source link so the user can read the original material and judge it in context. The core unit of the product is one MCP server per brain. Founders, CEOs and investors each become a searchable server built from their public output, and users add a brain to Claude, Cursor, ChatGPT or Codex to query it directly. The Product Hunt description notes that users can work with one URL per brain or a single URL for all of them, so the product supports both focused research on a single person and broader browsing across the whole roster. The directory also shows install counts, which give a practical signal of which brains other users reach for most: Alex Hormozi leads the listing with 85 installs, followed by Naval Ravikant with 31 and Marc Lou with 12 at the time of writing. Every answer cites its source. The site's sample questions show the intended format in practice: how do I know if my offer is underpriced, and how fast should I raise it, for Alex Hormozi; how do I come up with a startup idea worth working on, for Paul Graham; how do I validate a B2B SaaS idea before I build anything, for Vic Giurgiu. In each case the answer is expected to quote the talk, essay or post it came from with a link back to that material. That makes a brain useful both as a fast research shortcut and as a way to trace an idea to its original wording, which matters when a founder wants to quote or act on the advice. Discovery happens through the directory page, which is organized around several filters. Visitors can browse all 39 brains or narrow to indie hackers, AI builders, CEOs, investors, marketers, operators, health or thinkers. A search box lets users search founders or topics, with the site suggesting a query like pricing as an example. Results can be sorted by most installed, most sources, recently updated or alphabetically. Each entry surfaces the person's role and a short line of context, plus the number of talks and essays and posts behind the brain, an install count, and how recently it was updated, so users can judge depth and freshness before adding a server. The roster illustrates the range of the approach. It includes indie hackers and solo founders such as Marc Lou, Pieter Levels, Jack Friks, Alex West, Nevo David and Tibo Louis-Lucas; investors and fund figures such as Naval Ravikant, Jason Calacanis and Rob Walling; CEOs and operators such as Elon Musk, Sam Altman, Guillermo Rauch, Alexandr Wang and Jason Cohen; marketers and writers such as Justin Welsh, Ruben Hassid, Corey Haines, Shaan Puri, Lenny Rachitsky and Ryan Hoover; health-focused figures such as Andrew Huberman and Bryan Johnson; and even Socrates as a thinker. Source depth varies widely, from brains backed by a handful of talks and essays to Jason Cohen's 221 talks and essays and 300 posts. Overall, the product works as a layer between public knowledge and AI assistants. Public material is collected per person, packaged as an MCP server, and made reachable from Claude, Cursor, ChatGPT or Codex through a URL. The directory acts as the front door, with search, filters, sorting and per-brain statistics that help users pick the right source. The site also invites visitors to request a founder, CEO or investor for future builds, and to claim a brain if they are listed so they can verify it, fix anything that is wrong and add sources. Updates are visible on each card, with most brains showing recent refresh dates. The benefit is grounded answers rather than generic ones. Instead of asking an assistant what a well-known founder thinks and getting a plausible paraphrase, users get a response that quotes the underlying talk, essay or post and links to it. That is useful for founders making pricing, positioning, hiring or fundraising decisions, and for anyone who wants to check the original reasoning. Because the brains are exposed as MCP servers, the same source can be reused across different assistants without rebuilding the research each time, and the single-URL option makes the entire roster available in one connection. Use cases follow the sample questions on the site. A founder can ask how to tell whether an offer is underpriced and how quickly to raise prices, drawing on Alex Hormozi's material. A first-time builder can ask how to come up with a startup idea worth working on and get Paul Graham's essays as the cited basis. Someone preparing to launch can ask how Ryan Hoover approached building an audience before a product. A SaaS founder can ask how to validate an idea from Tibo Louis-Lucas or Vic Giurgiu, how to handle flattening growth from Jason Cohen, or how to set up Claude Code skills to run SaaS marketing from Corey Haines. Others use the health brains for questions about morning and evening routines for better sleep, or the marketer brains for LinkedIn growth and cold outreach replies. The audience is broad but specific in intent: founders, indie hackers, solo founders, operators, marketers, investors and anyone who wants cited answers from experienced public figures rather than unsourced AI output. The product is free and open source under the MIT license according to the Product Hunt listing. The site notes that the brains are unofficial and not affiliated with the people represented. The primary interface is the web directory, with the actual brains delivered as MCP servers that connect to AI assistants, and the roster continues to grow through requests. The Brains makes expert public material usable inside AI assistants without losing the trail back to the source. By packaging each founder, CEO or investor as a searchable MCP server and requiring every answer to cite the talk, essay or post behind it, it turns scattered advice into something a founder can query, verify and act on.