Rapu

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Private brain · private beta

Stop searching.
Start asking.

Forget file names, folder paths, and "what was his name again." Put everything into your brain — then just ask. It's private. It's yours. And only if you choose, others can connect to it too.

MCP-native · use any LLM Private beta Verified identity Encrypted at rest
live · anna's brain
emailMaria · lawyer recs
receiptLisbon hotel · €340
docLease 2024.pdf
contactSam Okafor
brain
Q — when does my lease expire?
31 Aug 2027. Notice period is 3 months, so you've got until 31 May 2027 to give notice.
01 — How it works

Three steps.
No hunting, no folders, no guessing.

01 · Drop it in

Feed your brain.

Forward an email to your private brain address. Drop a PDF into a watched folder. Connect a bank. That's the whole setup.

02 · It gets digested

Meaning, not keywords.

Your brain understands what's inside. It extracts dates, amounts, names and relationships, and quietly encrypts the sensitive bits before they leave your machine.

brain
03 · Just ask

Plain language. Real answers.

"How much did we spend on software?" "Which lawyer did Maria recommend?" Real answers, cited from your own stuff. Not web slop.

ASK
Who was that consultant Anna
mentioned at Continuum Summit?
02 — What it knows

Not just files.
Everything, connected.

Emails

Forward your inbox. Keep your real address hidden.

Every email, receipt and confirmation becomes searchable. Your brain gets a private address like you.x7k2@getrapu.ai — forward to it and you're in.

📮 Maria Ferreira · lawyer recs for Q22d
📮 Trans-Arc Air · FR2341 Lisbon confirmation receipt4d
📮 Westbay · policy renewal notice renewal1w
📮 Anna Bennett · intro to Sam Okafor contact2w
Documents

Drop a folder. Walk away.

Contracts, tax, medical, insurance. The desktop app watches a folder you pick — anything inside gets ingested, indexed, and encrypted.

Finances

Money questions, real answers.

Import statements. Transactions matched and categorised. Ask it how much you spent on software, and it'll tell you.

Mapspace€348.00
Taskline€192.00
Pagebook€156.00
Q1 software€1,248.90
Contacts

"Who was that consultant?"

Your brain stitches people together across emails, documents, and notes — so the answer takes one sentence, not twenty minutes.

Sam Okafor Anna Bennett Maria Ferreira David Patel Elena Rossi
Legal references

Laws, always current.

Legislation, court decisions, and government proposals — always up to date, always searchable. UK, Finnish and Estonian law today.

Connections

It links the dots you didn't know were dots.

A contract mentions a company that appears in three emails and an invoice you paid last spring. Your brain shows the whole thread, not a search result list.

contract.pdf → mentions → Kestrel Trading
Kestrel Trading → sender of → 3 emails (Mar–Jun)
invoice_884.pdf → paid to → Kestrel Trading
Kestrel Trading → introduced by → Anna Bennett
03 — Use any LLM

Your brain. Their LLM.
Your choice — every time.

Rapu is MCP-native. Any modern LLM client — Claude Code, Claude Desktop, Cursor, your custom agent — plugs in once and gets your brain's full memory, entity graph, calibration data, and reasoning surfaces. The brain stays with us. The conversation happens wherever you already work.

Claude Code

One terminal command.

The personal-brain MCP service plugs into your existing CLI workflow. Your code agent now knows your real corpus, not just public training data.

claude mcp add rapu \
--transport http \
--url https://...railway.app/mcp \
--header "Authorization: Bearer rapu_usr_..."
Claude Desktop

One JSON block.

Drop a snippet into your claude_desktop_config.json, restart, and Rapu's tools appear in the tool panel — ready for any conversation.

{
  "mcpServers": {
    "rapu": { ... }
  }
}
Anything that speaks MCP

The standard, nothing custom.

Cursor, Zed, Anthropic SDK, OpenAI agents through a bridge, your own loop with the official MCP libraries — Rapu is a standard MCP server. No proprietary protocol, no vendor lock-in.

Claude Code Claude Desktop Cursor Zed Anthropic SDK Your agent
What your LLM gets

A brain that remembers — and reasons.

Not just retrieval. Your LLM, augmented with semantic search across your documents, a graph of your entities and their relationships, typed claims with confidence and decay, a calibration loop that tracks which of your commitments came true, and an argumentation surface that computes which of your claims are defensible.

search_atoms(query) → semantic hits across your corpus
create_atom(...) → write a typed claim with provenance
synthesize_projection(...) → render a memo citing atoms
score_prediction(id, status) → close a calibration loop
forward_chain(atom) → "if this is wrong, what breaks?"
argumentation_extension() → defensible subset of claims
counterfactual_retract(atom) → simulate before acting
cross_brain_consensus(topic) → where your brains agree
Get my setup snippet ↗ Read the honest version
04 — Brain to brain

Share with the people who matter. Only what they need.

Connect your brain to someone else's. Both sides agree to every category. Either side can disconnect. Data never actually leaves your brain.

Youyour brain
Spouseinsurance · household
Accountantreceipts · statements
Lawyercontracts · read-only
Colleagueteam docs · edit
Parentdelegation · bills
↕ drag any node to rearrange
dashed lines = shared categories
05 — Try it

A sample brain.
Ask it anything.

This is Anna's brain — a fake person, but a real demo. Her lease, her lawyers, her Q1 travel. Ask a question and see what comes back.

anna's brain · read-only guest
encrypted · 312 items
06 — Private by default

Encrypted, logged, yours.

Rapu is built the way we'd want something that holds our whole life to be built. Not a compromise we hope to fix later.

AES

Encrypted at rest

AES-256-GCM, the bank standard. Keys stay with you.

PII

PII caught locally

Personal IDs and bank numbers are detected on your computer and encrypted before upload.

LOG

Tamper-proof log

Every search, every access, every share is recorded. The log can't be modified without detection.

ID

Verified identity

No passwords, no email signups. Your account is tied to a verified digital identity from day one.

If you don't own the keys, you don't own the brain.

Your documents, your relationships, your finances — they're not training data and they're not ours to lose. Rapu stays on your side or it doesn't exist.