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 it automatically.

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 14-day free trial on Starter and Pro and no card needed. Each plan includes monthly credits for AI actions. Refunds are handled case by case.

Where is my data stored?

Your library is stored in the EU, private to your account. AI providers process content to transcribe, summarise and embed it. You own your data: export your library as Markdown or JSON from Settings, or the whole corpus through MCP. Account deletion purges backups within 30 days.

Knowledge Playground: Quizzes and Flashcards — Help

Test and reinforce your knowledge with AI-generated quizzes, flashcards, and learning games.

The Knowledge Playground transforms your saved content into interactive learning experiences.

Available Activities

📝 Quizzes

AI-generated multiple-choice questions based on your saved content. Each question references specific items, tests comprehension, and provides explanations.

🎯 Flashcards

Spaced repetition flashcards, scheduled with FSRS spaced repetition and rated Again / Hard / Good / Easy. Cards are generated from key takeaways, entity definitions, and core concepts.

⚔️ Knowledge Duels

Challenge yourself with head-to-head quiz battles featuring timed questions, knowledge exchange, and leaderboard tracking.

Spaced Repetition

BrainTube uses FSRS spaced repetition:

New cards start with short intervals
Correctly recalled cards get longer intervals
Missed cards are shown more frequently
The system tracks your memory strength per item

How to Access

Go to Knowledge Playground
Choose an activity type
Select a topic or brain to quiz from
Start learning!

Tips

Regular short sessions (5-10 min) beat occasional long sessions
Quizzes are generated fresh each time — you won't see repeats