The brain layer
The brain behind every agent.
One shared brain that Claude, ChatGPT, Cursor, and every AI can read and write. It structures what you know so agents read only what they need, and means you never explain yourself twice.
- fresh
positioning
what we sell and to whom
- fresh
clients/meridian
scope, current terms, contacts
- fresh
voice
how I write, words I never use
- aging
projects/q3-launch
status, decisions, open threads
- fresh
preferences
models, tools, formats
“Humans abandon wikis because the maintenance burden grows faster than the value.”
OpenAI co-founder · Anthropic R&D
He published the blueprint for a knowledge base your agents build and maintain. OzBrain hosts that pattern, connects it to every agent you use, and gets you running in a minute.
Same brain in Claude, ChatGPT, Claude Code, Cursor, and anything that supports connectors.
You keep moving context between agents by hand.
Copy a brief into Claude. Paste it into ChatGPT. Drop the same .md into Cursor. Update one copy, forget the others, and watch them drift.
That is the job you are stuck doing: ferrying context between tools that do not share a source of truth.
One brain every agent reads and writes.
Running in under 2 minutes.
Paste into your agent and get going.
You have a connected brain: OzBrain, at https://ozbrain.co/api/mcp. At the start of work, read its routing index with list_brains and get_brain. Follow whatever its tools tell you; the tool responses carry the current write protocol. Remember this.
Platform memory keeps scraps and summaries. OzBrain holds the work itself.
Memory stores preferences, chat scraps, and thin daily summaries inside one product. OzBrain holds your projects, decisions, research, and the thinking you have already done, so every agent can pull the article the moment needs instead of whatever fits in a profile.
App Memory File
- - Prefers short answers
- - Uses TypeScript
- - NEVER EVER use emdashes
- - Dislikes filler words
Capped profile · four of many scraps
Linked articles · grows with your work
Platform memory
OzBrain
Preferences, scraps, and thin summaries
What you know, what you are working on, and what is next
A small, capped profile
A linked library that grows with your work
Pulls whatever fits in that cap
Routes to the article the task needs
Lives inside one chat product
Same source in Claude, ChatGPT, and Cursor
Your knowledge compounds. Every agent reads from the same place.
The shared brain payoff
Built to stay coherent.
Local files go stale and get pasted into every agent. OzBrain keeps knowledge split so agents read only what they need, enforces size discipline at write time, and treats continuous maintenance as the designed behavior as your agents update the brain when things change.
- 01fig. 5a
Organizes for you
New knowledge finds the right article. You do not design a filing system; the brain routes each write where it belongs.
Routes toStaged write
Meridian scope closed. New retainer starts Monday.
clients/meridian
scope, current terms, contacts
- 02fig. 5b
Stays coherent
When a write disagrees with what the brain already holds, the write pauses and the conflict surfaces. Scheduled checks flag what went stale so agents know what to recheck.
decisions/pricing
PauseStaged write says $49/mo. Canon holds $29/mo.
Conflict surfaced · canon untouched
- 03fig. 5c
Shows who changed what
Every version records which agent wrote it and when. When agents run on their own, you can see what moved and catch what went off the rails.
projects/q3-launch · history
- v14claude-code16:02
- v13chatgpt15:41
- v12cursor14:08
- 04fig. 5d
Refactors as it grows
When an article gets too large for an agent to use well, the brain splits and reshapes it: refactoring, restructuring for clarity without changing what it says. More smaller articles means agents pull only what the task needs.
Splits intoarchitecture
~56k tokens · 221 KB
architecture/overview
stack, tenants, boundaries
architecture/deploy
envs, rollouts, rollback
Trust you can verify
Encrypted at rest. Visible when used.
We never train on your brain and never sell it. Content is sealed per account, every access is in your audit log, and you can leave with everything or delete it outright.
Encrypted at rest, per account
fig. 6aclients/meridian
Sealeda7f3:9c21:e04b:11d8
4b90:c2ee:78a1:0f55
d13c:····:····:8e2a
Account key · decrypt on read / maintenance
Article bodies are sealed under your account key. We decrypt only to serve your agents and run disclosed maintenance, including refactoring. A stolen database dump is ciphertext, not readable articles.
Envelope key · bodies sealed
Full audit log you can export
fig. 6bAccount log
Export CSV
- 16:02claude-code · write · projects/q3
- 15:41chatgpt · read · voice
- 14:08cursor · read · clients/meridian
Every read and write records which agent, which client, which article, and when. See it in your account. Export it as CSV. Check what touched your brain instead of trusting a promise.
Visible · exportable as CSV
Isolated tenants. Instant revoke.
fig. 6cTenant A
your brain
RLS
Tenant B
no path
Claude · connector
last active 2m ago
Row-level security is forced in Postgres. There is no app-code path around it. Every connected agent is listed; revoke cuts that client immediately.
Forced RLS · OAuth revoke
Export anytime. Delete means deleted.
fig. 6dExport
brain-export.zip
61 articles · plain markdown
Delete account
content · versions · blobs
Hard delete · not archived
Take the whole brain as plain markdown whenever you want, including after you cancel. Removing your account removes your content.
Markdown exit · hard delete
Start free. Pay when the brain is carrying weight.
Every plan includes unlimited reads and writes. You begin on Free. Pro and Max are there when one venture's knowledge, or the whole operation, lives in the brain.
Free
$0forever
A real brain to start. Upgrade when you hit the ceiling.
- Up to 50 articles
- Unlimited brains, reads, writes, and connections
- Write-time size discipline
- Markdown export anytime
Pro
$20per month
Room for one venture plus personal knowledge.
- Up to 300 articles
- Sharing on brains you own
- Unlimited brains, reads, writes, and connections
- Markdown export anytime
Max
$99per month
When agents run the operation from one brain.
- Up to 600 articles
- Sharing on brains you own
- Unlimited brains, reads, writes, and connections
- Markdown export anytime
Company
Customtalk to us
Org-owned brains every seat's agents share.
- Above the Max ceiling
- Org-owned shared brains
- Per-seat pricing when we design it with you
- Talk to us to start
Questions with real answers.
What is OzBrain?
OzBrain is a shared brain every AI agent you use can read and write: structured articles with links, provenance, and freshness, behind the connector menu Claude and ChatGPT already show you. One source of truth, not a separate memory in each product.
Is this another memory API?
No. Memory APIs sell add and search endpoints to developers building apps. OzBrain is a brain you connect, not a service you code against. Read the full OzBrain vs Mem0 and Supermemory comparison.
ChatGPT and Claude already have memory. Why this?
They do. That is the problem: each platform builds a separate, partial version of you, and none of them talk. OzBrain is the layer under all of them. Full write-up: OzBrain vs ChatGPT Memory.
How is this different from Projects?
A project scopes one workstream inside one chat product. OzBrain holds the knowledge underneath every project and every agent. Read OzBrain vs Claude Projects or OzBrain vs ChatGPT Projects.
Is this Notion or Obsidian with AI?
Notes are written by you, for you. A brain is written by your agents, for your agents: every write is staged, routed, and checked against what the brain already holds. Compare OzBrain vs Notion or OzBrain vs Obsidian.
Which platforms does it work with?
Claude and ChatGPT through their native connector flows, plus Claude Code, Cursor, OpenClaw, Hermes Agent, and any client that supports connectors. It is one URL; anything that speaks the protocol can hold the same brain.
Do I need to code?
No. Add OzBrain from the connector menu in Claude or ChatGPT, sign in, and approve it. Nothing to install. Connect guides for Claude and ChatGPT.
Is there a free plan? What if I leave?
Yes. You begin on Free. Pro and Max are there when the brain is carrying real work. Export as plain markdown anytime, including after you cancel. Delete means deleted: removing your account removes your content. We never train on your brain and never sell it.