hebbian-mcp

Customer-installable adapter for the Hebbian tenant brain. Connect Claude Code, Claude Desktop, Cursor, and any MCP-compatible agent to your Hebbian workspace.

The adapter is a thin bearer-auth shim. Your token goes in; the Hebbian API enforces what you can read and write. All the logic — typed graph, ranking, fidelity scoring, synthesis — lives server-side. This package is intentionally auditable before you paste a credential.

Packages

| Package | Language | Install | |---|---|---| | @hebbianvault/mcp | TypeScript / Node.js | npm install -g @hebbianvault/mcp | | hebbianvault-mcp | Python | pip install hebbianvault-mcp |

Both expose the same 8 tools, the same auth flow, and the same token types. Use whichever matches your MCP host.

Quick start (TypeScript)

npm install -g @hebbianvault/mcp

Generate a token from your Hebbian integrations page (AI Tools tab → Generate token).

Claude Code

claude mcp add hebbian \
  -e HEBBIAN_API_TOKEN=hbn_emp_your_token_here \
  -- npx -y @hebbianvault/mcp

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "hebbian": {
      "command": "npx",
      "args": ["-y", "@hebbianvault/mcp"],
      "env": {
        "HEBBIAN_API_TOKEN": "hbn_emp_your_token_here"
      }
    }
  }
}

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "hebbian": {
      "command": "npx",
      "args": ["-y", "@hebbianvault/mcp"],
      "env": {
        "HEBBIAN_API_TOKEN": "hbn_emp_your_token_here"
      }
    }
  }
}

Quick start (Python)

pip install hebbianvault-mcp
# or with uv (preferred)
uv add hebbianvault-mcp

HEBBIAN_API_TOKEN=hbn_emp_your_token_here hebbian-mcp

Token types

| Token prefix | Scope | Issued from | |---|---|---| | hbn_emp_ | Employee — your personal brain | /integrations?tab=tools | | hbn_co_ | Company — full org brain (admin only) | /co/integrations?tab=tools |

Tokens expire after 90 days. Refresh from the AI Tools tab. Never commit tokens to git.

Tools

| Tool | Description | |---|---| | hebbian_read_node | Fetch a single node by UUID (body, frontmatter, provenance) | | hebbian_search | Full-text + semantic search across vault nodes | | hebbian_ask | Synthesis Q&A grounded in source_quotes (RAG) | | hebbian_capture | Capture text as a new seed into the vault | | hebbian_traverse | Walk the typed graph from a starting node | | hebbian_provenance | Source trail for a node | | hebbian_salience | Salience snapshot (no-op until SNN Phase 10) | | hebbian_recent_activity | Recent brain activity timeline |

Configuration

Environment variable

export HEBBIAN_API_TOKEN=hbn_emp_your_token_here

Config file (alternative)

Write ~/.config/hebbian/mcp-tenant.json:

{
  "token": "hbn_emp_your_token_here",
  "api_url": "https://api.<saas-apex>"
}

Enterprise self-host customers set HEBBIAN_API_URL to their VM's API endpoint.

Note: api.<saas-apex> is a placeholder — the Hebbian SaaS domain is not yet published. Enterprise customers configure their own endpoint via HEBBIAN_API_URL.

Onboarding

Sign in at the Hebbian app (link TBD — domain parked), navigate to AI Tools, and generate a tenant token. Paste it into your MCP client config as shown above.

Security

Tokens are bearer credentials — treat like passwords.
Never commit tokens to git. Use env vars or a config file outside your repo.
Tokens expire after 90 days. A 401 TOKEN_EXPIRED response means the token needs refreshing.
HTTPS-only transport. HTTP is rejected at the API edge.
The adapter source is intentionally public so you can audit what runs on your machine before pasting a credential. The API enforces all access control server-side (row-level security by tenant + actor).

Source layout

ts/    — TypeScript package (@hebbianvault/mcp, npm)
py/    — Python package (hebbianvault-mcp, PyPI)

Development

TypeScript

cd ts/
npm install
npm run build
npm test

Python

cd py/
uv install --dev
pytest
ruff check src/ tests/

Contributing

See CONTRIBUTING.md.

License

Apache-2.0. See LICENSE.

The Hebbian API that this adapter connects to is proprietary and closed-source (ADR-017). This adapter package is the open-source reference client.

MCP Servers