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io.github.gogogadgetbytes/smart-connections

MCP server for Obsidian Smart Connections. Semantic search using your vault's embeddings.

Open source Open in the app JSON README (API)

About

MCP server for Obsidian Smart Connections. Semantic search using your vault's embeddings.

Details

Kind
MCP servers
Topic
AI, RAG & memory
Publisher
gogogadgetbytes
Origin
official
Category
ferramentas
Transport
local
Version
0.2.0
Stars
3
Forks
2
Last push
2026-02-03T23:13:44Z
Repository state
ativo
Language
TypeScript
License
MIT
Added
2026-08-29 03:02:51
Updated
2026-08-29 03:02:51
Origin id
io.github.gogogadgetbytes/smart-connections

README

# Smart Connections MCP Server

[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
[![Node.js Version](https://img.shields.io/badge/node-%3E%3D18-brightgreen)](package.json)

A security-first MCP server for Smart Connections. Read-only. Path-validated. Auditable.

Exposes [Smart Connections](https://github.com/brianpetro/obsidian-smart-connections) embeddings to Claude Code and other [MCP](https://modelcontextprotocol.io/) clients for semantic search of your Obsidian vault.

## Why This Exists

We needed semantic search of our Obsidian vault from Claude Code. Existing options have problems:

- **No path validation** - User input passed directly to file operations
- **Write access** - Some expose mutation tools we don't need
- **Heavy dependencies** - PyTorch/transformers for what's essentially vector math

This implementation:
- **Minimal dependencies** - MCP SDK + Transformers.js (for text search)
- **Fail-closed security** - path validation with realpath, symlink detection
- **Auditable** - small TypeScript codebase you can actually read

## Features

- **Text search** - query with plain text, not just note paths
- **Semantic search** using Smart Connections embeddings
- **Local inference** - uses Transformers.js (same model as Smart Connections)
- **Read-only** - no write operations, no shell execution
- **Secure** - strict path validation, bounded responses
- **Offline** - works without Obsidian running

## Security Model

| Property | Guarantee |
|----------|-----------|
| Path confinement | All file access validated against vault root |
| No traversal | `../` and symlink attacks blocked |
| Read-only | No write operations exposed |
| Bounded responses | Capped results (50), content length (10KB) |
| Fail closed | Errors deny access, never bypass |
| Audit logging | Security events logged with context |

## Installation

### Prerequisites

- Node.js 18+
- Obsidian with [Smart Connections](https://github.com/brianpetro/obsidian-smart-connections) plugin installed
- Embeddings built (open vault in Obsidian, let Smart Connections index)

### Setup

```bash
git clone https://github.com/gogogadgetbytes/smart-connections-mcp
cd smart-connections-mcp
npm install
npm run build
```

### Configure Claude Code

Add to your Claude Code config:

```bash
claude mcp add smart-connections \
  -e VAULT_PATH="/path/to/your/obsidian/vault" \
  -- node /path/to/smart-connections-mcp/dist/index.js
```

Or manually add to `~/.claude.json`:

```json
{
  "mcpServers": {
    "smart-connections": {
      "command": "node",
      "args": ["/path/to/smart-connections-mcp/dist/index.js"],
      "env": {
        "VAULT_PATH": "/path/to/your/obsidian/vault"
      }
    }
  }
}
```

Restart Claude Code to load the server.

## Usage

Once configured, Claude Code can use these tools:

### Search by Text

```
"Search my vault for notes about backup strategies"
→ Uses search_by_text tool
```

### Search Similar Notes

```
"Find notes similar to Topics/Claude_Code.md"
→ Uses search_similar tool
```

### Get Note Content

```
"Show me the content of Topics/Obsidian.md"
→ Uses get_note tool
```

### List Indexed Notes

```
"What notes are indexed in my vault?"
→ Uses list_indexed tool
```

## Tools

| Tool | Description |
|------|-------------|
| `search_by_text` | Search using freeform text (computes embedding locally) |
| `search_similar` | Find notes semantically similar to a given note |
| `search_by_embedding` | Search using a raw embedding vector |
| `get_note` | Get content of a specific note (path validated) |
| `get_model_info` | Get embedding model configuration |
| `list_indexed` | List all indexed notes |

## Configuration

| Variable | Required | Description |
|----------|----------|-------------|
| `VAULT_PATH` | Yes | Absolute path to Obsidian vault |

## Limitations

- **Single vault** - Configure one vault per MCP server instance
- **Index from Smart Connections** - Note embeddings come from the plugin; text queries are embedded locally
- **No write access** - By design; use Obsidian for edits
- **First run downloads model** - ~50MB model cached in `~/.cache/huggingface/`

## Development

```bash
# Build
npm run build

# Test with MCP Inspector
npx @modelcontextprotocol/inspector node dist/index.js
```

## Contributing

See [CONTRIBUTING.md](CONTRIBUTING.md). Security-focused PRs welcome.

## Security

To report security vulnerabilities, please email gogogadgetcode@proton.me. Do not open public issues for security concerns.

## License

MIT - see [LICENSE](LICENSE)

## Credits

- [Smart Connections](https://github.com/brianpetro/obsidian-smart-connections) by Brian Petro
- [Model Context Protocol](https://modelcontextprotocol.io/) by Anthropic

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