Power your agent
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Host a copy with our keys and logs.
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STRATA_URL=<value> STRATA_API_KEY=<value> claude mcp add io.github.agenerationforwordz-tech-strata -- npx -y strata-mcp-server@2.2.0รันในเทอร์มินัล
{ "mcpServers": { "io.github.agenerationforwordz-tech-strata": { "command": "npx", "args": [ "-y", "[email protected]" ], "env": { "STRATA_URL": "<value>", "STRATA_API_KEY": "<value>" } } }}claude_desktop_config.json
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A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.
เปิดจากผู้เผยแพร่
This repository is superseded by SOLUM. SOLUM is the actively developed version of this project: PostgreSQL + pgvector instead of SQLite, a larger tool set, and numerous fixes not present here. New users should start with SOLUM. This repository remains available for reference.
Self-hosted AI memory server. Your thoughts, your hardware, your data.
Self-hosted AI memory server. Persistent memory on your hardware, not the cloud.
Your AI forgets everything the moment the session ends. Strata fixes that. It gives any MCP-compatible AI a persistent memory that lives on YOUR hardware - not in the cloud, not on someone else's server. Search by meaning, attach real files, and run it all on a Raspberry Pi.
v2.0 taught Strata who's talking. v2.2 teaches it to scale, audit, and remember your past.
read / write / delete / admin / kill permissions. You stop sharing one key across every tool. Manage them from /admin/agents./api/*. Any agent with write or kill permission can pull the brake; only a human admin can flip it back on. Built for the moment a tool goes rogue./constellation. Sacred-geometry layout (Flower of Life background, dodecahedron clusters, Fibonacci sphere distribution), per-agent colors, live activity stream, and a kill-switch indicator that desaturates the whole scene when MCP is offline.strata system user owns the database with mode 600. SSH users can no longer bypass the API by editing the SQLite file directly.STRATA_DEMO_MODE=true and the dashboard accepts blank passwords (the login screen still renders so visitors can see the auth feature exists).New in v2.2:
STRATA_DB_BACKEND=postgresql for production. PostgreSQL handles concurrent multi-agent writes natively (no more write queue), and pgvector does similarity search IN the database with HNSW indexes. Scales to 1 million+ thoughts.data/audit/. Full replay tape: who searched what, which thoughts came back, how long it took. This is the transparency layer — trace exactly how an AI built its understanding of your data. View via GET /api/audit.capture_legacy. These get negative IDs (-1, -2, -3...) and live in the same constellation alongside your current thoughts. Your AI memory doesn't start at install day — it reaches back as far as you want. Click "THOUGHTS" in the constellation viewer to toggle between current and historical views.idea (brainstorms, not yet decided) and observation (patterns noticed, no conclusions drawn). The agent protocol now spells out type selection so every new user's constellation is balanced.strata_status now teaches agents about all 10 types, negative ID history, the audit log, and outcome loop tracking. No CLAUDE.md needed — the protocol IS the onboarding.Plus the v1 features you already know: semantic search, file vault, dedup protection, password+seed-phrase dashboard auth, dark theme, runs on a Pi.
I built this because I got tired of my AI tools forgetting everything between sessions. STRATA gives any MCP-compatible AI (Claude Code, Codex CLI, whatever comes next) a persistent brain that lives on YOUR machine. Not in the cloud. Not on someone else's server. Yours.
It runs on a Raspberry Pi 4B. Seriously. The whole thing - semantic search, file storage, embeddings - runs on a $55 computer with 4GB of RAM.
Regular databases search by keywords. If you stored "switching careers" but search for "new job", you get nothing.
STRATA converts every thought into a 768-dimensional vector that captures what it means. Similar ideas land near each other in that vector space. So "switching careers" and "new job" and "career change" all find each other.
The model runs locally through ONNX Runtime (not PyTorch - that thing eats 1.5GB just to import on ARM). Total RAM for the embedding model is about 100-150MB, and it unloads after 5 minutes of idle time.
This is what makes STRATA more than a note-taking app.
You capture a thought about a project. Then you attach the actual source files to it. Later, when you or your AI searches for that topic, you get the thought AND a list of every file attached to it. The AI picks which files it needs and pulls just those - it doesn't load your whole drive into memory.
Files are organized on disk like this:
data/vault/
my-laptop/
2026-03/
42/
server.py
config.py
my-desktop/
2026-03/
55/
training_data.csv
Organized by device and month. You can browse it manually if you want. Files up to 1GB, text files capped at 5MB when returned to AI (so it doesn't blow up the context window).
Your AI memory doesn't have to start at install day. Import your past:
# Via MCP tool
capture_legacy(
content="Decided to self-host everything after the cloud bill hit $400/mo",
thought_type="decision",
tags=["infrastructure", "self-hosting"],
original_date="2024-06-15",
source="pre-strata"
)
Legacy thoughts get negative IDs (-1, -2, -3...) while live thoughts use positive IDs. Both are fully searchable — they live in the same vector space. The constellation viewer has a toggle: click "THOUGHTS" to dim current stars and highlight your history.
Every agent interaction is logged to daily CSV files in data/audit/:
data/audit/
audit_2026-04-19.csv
audit_2026-04-20.csv
...
Each row records:
Query today's log via REST: GET /api/audit?limit=50
Override the directory: STRATA_AUDIT_DIR=/your/path
Disable entirely: STRATA_AUDIT_ENABLED=false
SQLite works great for getting started and single-user setups. For production with multiple agents hitting Strata simultaneously, switch to PostgreSQL:
# Install PostgreSQL 17 + pgvector
sudo apt install postgresql-17 postgresql-17-pgvector
# Create the database and user
sudo -u postgres createuser strata
sudo -u postgres createdb strata_db -O strata
sudo -u postgres psql -c "ALTER USER strata PASSWORD 'your-password-here';"
# Run the schema (creates tables, indexes, triggers)
sudo -u postgres psql -d strata_db -f strata_pg_schema.sql
# Set the backend
export STRATA_DB_BACKEND=postgresql
export STRATA_PG_PASSWORD=your-password-here
# Start Strata — it auto-detects the backend
python server.py
If you already have thoughts in SQLite:
python migrate_to_pg.py
This migrates all thoughts, embeddings, history, agent keys, and profiles. Your SQLite database is preserved as a backup.
The repo ships with a pre-populated demo database: 666 curated thoughts about Strata itself, 3 sample agents with palette colors, ready to explore. No mining, no seed data hunt, no thinking about what to capture first — just clone, drop the demo DB into place, and see the constellation populated.
git clone https://github.com/agenerationforwordz-tech/strata.git
cd strata
python -m venv venv
source venv/bin/activate # Windows: venv\Scripts\activate
pip install -r requirements.txt
# Drop the curated demo dataset into place
mkdir -p data
cp demo/strata.db data/strata.db
# Run with demo mode so blank passwords work for visitors
STRATA_DEMO_MODE=true python server.py
⏱️ First install takes 5–15 minutes.
pip install -r requirements.txtdownloads about 700 MB of binary wheels for the embedding model runtime (fastembed,onnxruntime,numpy,transformerstokenizer support). Don't kill the install if it appears stuck — it's downloading binaries in the background. Subsequent installs reuse the venv and take seconds. Run withpip install -r requirements.txt --progress-bar onif you want to watch the byte count tick up.
Open these in your browser:
See demo/README.md for the full demo dataset details, including how to regenerate your own.
A few Windows-specific gotchas worth knowing about:
D:\ or any non-system drive, Git may refuse to operate on the repo with fatal: detected dubious ownership in repository. Fix:
git config --global --add safe.directory 'D:/Claude Code Projects/strata'
$env:, not export. To set the demo-mode flag and run:
$env:STRATA_DEMO_MODE = "true"
python server.py
[System.Environment]::SetEnvironmentVariable('STRATA_DEMO_MODE','true','User')
pip processes can hold file locks in the venv during a long install. If you cancel an install and re-run it and get permission errors, kill any leftover python.exe processes via Task Manager or Stop-Process -Name python -Force and try again.git clone https://github.com/agenerationforwordz-tech/strata.git
cd strata
python -m venv venv
source venv/bin/activate # Linux/macOS
# or: venv\Scripts\activate # Windows
pip install -r requirements.txt
# Optional: legacy fallback admin key for delete operations.
# In v2, every agent has its own key issued from /admin/agents,
# but this admin key is required for destructive operations.
export STRATA_ADMIN_KEY="different-key-for-delete-ops"
python server.py
⏱️ Same first-install warning as above —
pip install -r requirements.txtis downloading ~700 MB of binary wheels for the embedding model runtime. Plan for 5–15 minutes on first install.
After the server starts, open http://localhost:4320/admin/agents to register your first agent. Per-agent keys are how AI clients connect — see the "Connecting your AI" section below.
Server runs at http://0.0.0.0:4320.
First, register the agent at http://your-server:4320/admin/agents and copy its key. Each agent should have its own key — that's how the per-agent permissions, identity colors, and audit trail work.
Strata ships as a Claude Code plugin. Add the marketplace once, then install:
claude plugin marketplace add agenerationforwordz-tech/strata-plugins
claude plugin install strata@strata-plugins
During install you'll be prompted for two things:
strata_url — e.g. http://localhost:4320/mcp for a local installstrata_api_key — the agent key you copied from /admin/agentsRestart Claude Code and your AI has persistent memory across every session.
claude mcp add --transport http strata http://your-server-ip:4320/mcp \
--header "X-API-Key: agent-your-key-here"
Or add to ~/.claude/settings.json:
{
"mcpServers": {
"strata": {
"url": "http://your-server-ip:4320/mcp",
"headers": {
"X-API-Key": "agent-your-key-here"
}
}
}
}
Codex CLI's MCP config lives in ~/.codex/config.toml (Windows: C:\Users\<you>\.codex\config.toml). Add this block:
[mcp_servers.strata]
url = "http://your-server-ip:4320/mcp"
env_http_headers = { "X-API-Key" = "STRATA_CODEX_API_KEY" }
startup_timeout_sec = 15.0
tool_timeout_sec = 60
Then set the env var that the env_http_headers line references — Codex resolves it at startup, not at config-load time:
Linux/macOS:
export STRATA_CODEX_API_KEY="agent-your-codex-key-here"
Windows (persistent across sessions):
[System.Environment]::SetEnvironmentVariable('STRATA_CODEX_API_KEY','agent-your-codex-key-here','User')
Verify with:
codex mcp get strata
You should see the entry with enabled: true.
⚠️ Known Codex CLI issue (as of v0.120.0 on Windows): the streamable HTTP transport discovers Strata's tools correctly, but
codex execmay cancel actual tool calls client-side withuser cancelled MCP tool call. This appears to be a Codex CLI bug, not a Strata bug — Strata's server logs show200 OKon the MCP requests. If you hit this, report it to the Codex CLI repo. The same Strata server works fine with Claude Code, the dashboard, and direct REST calls.
Every connected agent should call strata_status as its first tool call. That tool returns a natural-language protocol that teaches the agent when to capture, when to search, how to handle the 10 thought types, and how to interpret negative-ID legacy imports. No CLAUDE.md configuration required — the tool teaches itself.
Admins can customize the protocol per-instance by writing to the system_config['agent_protocol'] row via the dashboard or the REST endpoint:
curl -X PUT http://your-server:4320/admin/api/protocol \
-H "X-API-Key: $STRATA_ADMIN_KEY" \
-H "Content-Type: application/json" \
-d '{"protocol": "...your custom instructions..."}'
Send an empty string to reset to the default.
# Save a thought
curl -X POST http://your-server:4320/api/capture \
-H "Content-Type: application/json" \
-H "X-API-Key: your-key" \
-d '{"content": "STRATA is running on my Pi!", "tags": ["setup"]}'
# Search by meaning
curl -X POST http://your-server:4320/api/search \
-H "Content-Type: application/json" \
-H "X-API-Key: your-key" \
-d '{"query": "server setup", "limit": 5}'
# Health check (no auth needed)
curl http://your-server:4320/health
All in config.py. Override with environment variables:
STRATA includes a full web dashboard at http://your-server:4320/dashboard. No extra setup needed - first visit walks you through account creation.
AI clients (Claude Code, Codex, etc.) still use the API key via X-API-Key header. The dashboard auth is a separate system - they don't interfere with each other.
#tagname in the search bar for the same thing.In v1, every AI tool shared one STRATA_API_KEY. That worked when "every AI tool" was just you and Claude Code. As soon as you have a Surface laptop, a Helios desktop, a few telegram bots, and a nightly cron job all hitting Strata, you want to know which agent did what — and you want to be able to revoke any one of them without taking the others down.
v2 ships per-agent keys. Open /admin/agents, click "Register New Agent", give it a name, and you get a unique key like agent-G8O1bK2kQiN3F0Haq03e_0kIh5D8YiFo. The agent uses that key in its X-API-Key header — server.py looks it up on every request and checks the granular permission flags.
The dedicated human admin key (STRATA_ADMIN_KEY) is always separate and never appears in the agent table. It's the master override for the operations no agent should be able to do on its own — re-enabling the kill switch, granting admin to other agents, raising the active-agent cap.
One toggle locks every agent out of MCP, REST, and /api/*. Hit it from /admin/agents (the big shield panel at the top) or via REST:
curl -X PUT http://your-server:4320/admin/api/mcp-toggle \
-H "X-API-Key: your-agent-or-admin-key" \
-H "Content-Type: application/json" \
-d '{"enabled": false}'
The permission model is asymmetric on purpose:
can_write=1 or can_kill=1. This is a safety valve. An agent that detects it's compromised must be able to pull the brake without begging the human for admin rights first.When the kill switch is off, every /mcp, /sse, and /api/* request returns 503 Service Unavailable. The audit log records who flipped it ([KILL SWITCH] Global MCP access DISABLED by claude-on-surface). The constellation viewer reflects the state in real time — see below.
Open http://your-server:4320/constellation and watch your brain think. It's a 3D visualization of every thought in your database, distributed across the surface of a Fibonacci sphere with each cluster snapping to the vertices of a dodecahedron. Behind it sits a Flower of Life canvas — barely visible by default, slider-adjustable. Sacred geometry, all the way down.
When an agent searches or captures, the constellation lights up in that agent's color and beams flow from the agent badge to each matching thought. Per-agent colors are stored in the database (editable from the admin panel) so the viewer always reflects current identity.
When the MCP kill switch flips off, the whole scene desaturates to silver-grey, the auto-rotation slows to ~15%, and a centered "MCP DISCONNECTED" overlay appears with the actor name in their identity color. The visual is impossible to miss across the room.
Use it as a wallpaper: http://your-server:4320/constellation?mode=wallpaper strips the UI and runs the constellation full-screen.
By default Strata stores its SQLite database as a plain file. That's fine for personal installs on a NAS you control, but if your threat model includes "someone walks off with the drive" or "a backup leaks", you want the data encrypted at rest.
sudo ./setup_encryption.sh
The script:
sqlcipher and the pysqlcipher3 Python binding/etc/strata/db.key (mode 400, root-only)sqlcipher_export()STRATA_DB_ENCRYPT=true and STRATA_DB_KEY_FILE=/etc/strata/db.key in the systemd serviceAfter restart, db.py opens the database via pysqlcipher3 instead of sqlite3, and every query runs against AES-encrypted pages. The key never lives in code or environment variables — only in the root-owned file.
If you lose the key, the database is unrecoverable. Back it up somewhere safe.
To run unencrypted (the default), do nothing. The encryption code path is dormant unless STRATA_DB_ENCRYPT=true is set.
Even with the API key system, anyone with SSH access to the host could open strata.db directly with sqlite3 and bypass all your auth, rate limits, and audit trails. setup_secure.sh closes that hole:
sudo ./setup_secure.sh
The script:
strata system user (no login, no home dir)strata:strata mode 700strata userAfter restart, the Strata process can read and write the database, but no other user (including nacho or root without explicit elevation) can touch the file directly. All access has to go through the API — which means rate limits, auth checks, and audit logs apply uniformly.
For public demos at conferences, on a tablet at the booth, or on a public-facing URL, you don't want the auth screen to lock visitors out. Set STRATA_DEMO_MODE=true in the server environment and:
/api/auth/setup and /api/auth/loginThis is for demos only. NEVER set it on a real deployment — it removes the authentication barrier entirely.
STRATA_DEMO_MODE=true python server.py
Create /etc/systemd/system/strata.service:
[Unit]
Description=STRATA Memory Server
After=network.target
[Service]
Type=simple
User=your-user
WorkingDirectory=/path/to/strata
ExecStart=/path/to/strata/venv/bin/python server.py
Environment=STRATA_API_KEY=your-secret-key
Environment=STRATA_ADMIN_KEY=your-admin-key
Environment=STRATA_DATA_DIR=/path/to/your/data
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
sudo systemctl daemon-reload
sudo systemctl enable strata
sudo systemctl start strata
AI Clients (Claude Code, Codex, bots) Humans (browser/tablet)
| | |
MCP (/mcp) REST (/api/*) Dashboard (/dashboard)
| | Constellation (/constellation)
| | Admin (/admin/agents)
| | |
+---- MCPKillSwitchMiddleware (rejects all when off) -----+
| | |
+-------- server.py - rate limiting, sanitization --------+
| | |
Per-agent keys Per-agent keys Password + session auth
(X-API-Key) (X-API-Key) (auth.py - PBKDF2, seeds)
agent_keys.py agent_keys.py users + sessions tables
| | |
embedder.py vault.py activity_stream (SSE)
ONNX model file storage per-agent broadcasts
on-demand by device/month |
| | |
db.py - SQLite (or SQLCipher) + FTS5 + numpy
thoughts + attachments + users + sessions + agent_keys
Built to run on a Raspberry Pi 4B (4GB). Here's what it actually uses:
Model loads when you need it, unloads after 5 min idle.
A fresh install needs roughly 1GB of disk space. A 16GB SD card is plenty. The database and file vault grow with usage, so if you plan to attach a lot of files, point the vault at external storage.
Minimum specs: any machine with 2GB RAM, 2GB free disk, and Python 3.10+.
read / write / delete / admin / kill flags. Revoke or disable any one without taking the others down.setup_encryption.sh)strata system user owns the DB at mode 600 (setup_secure.sh)setup_*.sh scripts are opt-inSTRATA supports an optional extensions.py file that registers additional MCP tools and REST endpoints. This is how you add custom functionality to your deployment without modifying the core server.
If extensions.py is present in the project directory, the server automatically loads it at startup. If it's missing, the server runs perfectly fine with the 16 core tools.
Tools marked (extension) in the table above are available through extensions. They're documented so you know what's possible, but the implementation isn't included in this repo. Create your own extensions.py with a register_extensions() function to add custom tools.
PolyForm Noncommercial License 1.0.0. Copyright (c) 2026 A Generation Forwordz Foundation.
STRATA is source-available software. Use it, improve it, share it, learn from it. Just keep it free and give credit. Do not sell it.
For commercial licensing inquiries, contact A Generation Forwordz Foundation.
See LICENSE for details.
Built by Christian Mitchell. If you use this, keep the attribution.
Self-hosted AI memory server. Persistent memory on your hardware, not the cloud.
{ "mcpServers": { "io.github.agenerationforwordz-tech-strata": { "command": "npx", "args": [ "-y", "[email protected]" ], "env": { "STRATA_URL": "<value>", "STRATA_API_KEY": "<value>" } } }}เครื่องมือ
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FAQ
คัดลอกคอนฟิก stdio สำหรับ Cursor, Claude Desktop, Claude Code หรือ VS Code ได้ในหน้านี้ คอนฟิกนี้ใช้การติดตั้งของผู้เผยแพร่ ไม่ใช่พร็อกซีของ PlugMCP
ผู้เผยแพร่ระบุตัวแปรสภาพแวดล้อมเหล่านี้: STRATA_URL, STRATA_API_KEY
Strata ทำงานแบบโลคัลผ่าน stdio
ตรวจสอบล่าสุดเมื่อ 2026-11-09 Self-hosted AI memory server. Persistent memory on your hardware, not the cloud.