BrainTube

BrainTube is a personal knowledge MCP server that compiles everything you watch, read, and save into a persistent memory layer any AI tool can query.

What is BrainTube?

BrainTube captures content from YouTube, articles, podcasts, PDFs, Notion pages, screenshots, meetings, and web pages, and auto-transcribes it into a searchable corpus. It is an AI-agnostic personal knowledge base: a single MCP endpoint exposes your saved knowledge to Claude, ChatGPT, Cursor, and any MCP-compatible agent. The project is open source on GitHub, with a hosted server at MCP endpoint. Under the hood it uses per-user JWT authentication and pgvector embeddings for semantic search.

Key Features

• Capture everything — Save URLs, files, screenshots, or notes from YouTube, podcasts, articles, PDFs, Notion, and meetings; each item is automatically transcribed and made searchable.
• Auto-compile into a corpus — BrainTube auto-summarizes, auto-tags, and auto-links items into a knowledge graph of entities, topics, and themes grounded in your actual reads and watches.
• MCP integration — The hosted MCP endpoint connects your knowledge base to Claude, ChatGPT, Cursor, and any MCP-compatible agent, giving them persistent memory across sessions.
• Cited recall — Ask your brain in plain language and get answers with citations to the exact source: video timestamp, article paragraph, or podcast minute.
• Export anytime — Your full corpus exports as Obsidian markdown or a JSON graph, so you can leave or migrate without losing data.
• Privacy by design — Row-level isolation, EU-grade infrastructure, and no training on shared models; your data is only yours.
• Credits system — Each save, search, or brain chat consumes credits, with a free tier of 30 credits per month and paid tiers up to 5,000 credits.

Who is it for?

• Solo founders and indie hackers — Switch AI tools as often as you like without rebuilding memory; the brain persists behind any MCP client.
• Knowledge workers and consultants — Save articles, podcasts, and meeting notes, then ask the brain for a weekly digest of what mattered.
• Engineers using AI coding agents — Connect your research notes via MCP so Cursor or Claude reads your saved context before writing code.
• Heavy media consumers — Turn years of YouTube and podcast history into a searchable library you can query in plain language.

What can you do with BrainTube?

• Search everything you've watched and listened to: save YouTube videos and podcasts, get transcripts, and ask questions that return answers cited to the exact timestamp or minute.
• Make your AI assistant actually remember: connect the MCP endpoint to Claude, ChatGPT, or Cursor so your saved research becomes context for every conversation.
• Build a personal second brain: Notion, Obsidian, PDFs, and screenshots all land in one corpus that auto-links topics and themes.
• Keep your data portable: export as Obsidian markdown or JSON graph any time, so your knowledge moves with you.

How does BrainTube work?

BrainTube follows a four-step pipeline: capture, compile, connect, recall. You save a URL, file, or screenshot; BrainTube transcribes and indexes it; it auto-summarizes, tags, and links the content into a graph; then you query your brain in plain language or via MCP. The hosted server handles the heavy lifting, and you access everything through the web app or the MCP endpoint.

Pricing

BrainTube is freemium: a Free tier ($0/mo) offers 30 credits per month for saving and searching your first items. Paid tiers are Starter at $9/mo (250 credits), Pro at $19/mo (1,000 credits), and Pro+ at $49/mo (5,000 credits). A credit is one unit used for saves, searches, or brain chat; cancel anytime and export your corpus.

FAQ

Is my data really mine?

Yes. You can export your full corpus anytime as Obsidian markdown or JSON graph. BrainTube does not train on shared models and uses EU-grade infrastructure with row-level isolation, so your data stays isolated to your account.

What can I capture?

You can save YouTube videos, articles, podcasts, PDFs, Notion pages, Obsidian notes, screenshots, meeting notes, and web content. Every item is automatically transcribed and made searchable, and the system auto-tags and links topics for later retrieval.

How does BrainTube connect to AI tools?

BrainTube exposes an MCP endpoint at the URL listed above. You add that endpoint to MCP-compatible clients like Claude, ChatGPT, Cursor, or any agent, and they can query your knowledge base as persistent memory.

What does it cost?

The Free tier gives 30 credits per month with no card. Paid plans start at $9/month for 250 credits, with higher tiers for power users. Credits are consumed by saving items, running searches, or asking your brain; exporting is always free.