How do I save my first item?

Paste any YouTube URL, article, or PDF into the capture bar. BrainTube extracts the transcript, generates a summary, and indexes everything within a minute.

How do I connect BrainTube to Claude or Cursor?

Open /connect in the app to get your MCP URL and API key, then paste it into Claude Desktop's config or Cursor's MCP settings. Your library becomes a tool the AI can call.

A Brain is a focused group of items you can chat with. Dashboard → Brains → New, pick items, give it a name. You can keep it private or share it publicly via a slug.

How does billing work?

Plans run monthly or annually with a 7-day trial. BrainTokens cover AI usage on top of your plan. Refunds within 14 days, no questions asked.

Where is my data stored?

EU-region infrastructure. You own your data, you can export it as JSON anytime, and account deletion purges backups within 30 days.

What is BrainTube? — Help

An overview of BrainTube — your AI-powered knowledge corpus and universal MCP server.

BrainTube is an AI-powered knowledge corpus platform that transforms everything you consume — YouTube videos, web articles, PDFs, screenshots, meeting notes, and more — into a searchable, AI-queryable personal knowledge base.

Core Concepts

📚 Your Personal Library

Every piece of content you save becomes part of your Library — a unified collection of all your knowledge sources. BrainTube automatically extracts transcripts, generates summaries, identifies key entities, and tags content for easy retrieval.

🧠 Second Brains

BrainTube automatically discovers topic clusters in your content and creates "Second Brains" — specialized AI agents that deeply understand specific domains of your knowledge. Each brain can answer questions, generate quizzes, and provide insights scoped to its topic.

🔌 Universal MCP Server

BrainTube acts as a Model Context Protocol (MCP) server, meaning any AI tool that supports MCP (Claude, ChatGPT, Cursor, Gemini CLI) can directly query your personal knowledge base. Your AI assistant becomes an extension of your memory.

🔍 Semantic Search

Using advanced vector embeddings and hybrid search (combining semantic understanding with keyword matching), BrainTube finds relevant content even when you don't remember the exact words.

How It Works

Save — Use the Chrome Extension, paste a URL, or connect Notion/Obsidian
Enrich — AI automatically extracts metadata, entities, summaries, and embeddings
Connect — Content is linked via a Knowledge Graph that discovers relationships
Query — Search, chat with your brains, or connect via MCP to any AI tool

Who Is BrainTube For?

Researchers building comprehensive literature reviews
Lifelong learners who consume hours of educational content
Professionals who need instant recall of past readings and videos
Developers who want their AI tools to have persistent memory

Get started by installing the Chrome Extension or saving your first content.