# MCP Bridge (MCP server)

> MCP Bridge is an MCP server that exposes silverbullet-ai tools from a SilverBullet space to MCP clients. It has 106 GitHub stars, is released under the AGPL-3.0 license and runs locally with npx -y silverbullet-ai-mcp. It works with Claude Desktop, Claude Code, Cursor and VS Code and needs an API key.

MCP server that exposes the silverbullet-ai tools in a SilverBullet space to MCP clients like Claude Code, Claude Desktop and Cursor.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/justyns/silverbullet-ai |
| GitHub stars | 106 |
| License | AGPL-3.0 |
| Language | TypeScript |
| Transport | stdio |
| Packages | npm: silverbullet-ai-mcp |
| Remote URL | none |
| Needs API key | yes |
| Official | no |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Other |
| Latest release | 0.9.3 (Sep 24, 2026) |
| Last commit | Oct 6, 2026 |
| MCP registry name | io.github.justyns/silverbullet-ai-mcp |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "mcp-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "silverbullet-ai-mcp"
      ],
      "env": {
        "SB_URL": "your-value",
        "SB_AUTH_TOKEN": "your-value"
      }
    }
  }
}
```

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

### Claude Code

```sh
claude mcp add --env SB_URL=your-value --env SB_AUTH_TOKEN=your-value --transport stdio mcp-bridge -- npx -y silverbullet-ai-mcp
```

### Cursor (.cursor/mcp.json)

```json
{
  "mcpServers": {
    "mcp-bridge": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "silverbullet-ai-mcp"
      ],
      "env": {
        "SB_URL": "your-value",
        "SB_AUTH_TOKEN": "your-value"
      }
    }
  }
}
```

Project file; use ~/.cursor/mcp.json to enable it in every project.

### VS Code (.vscode/mcp.json)

```json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "sb_auth_token",
      "description": "SB_AUTH_TOKEN",
      "password": true
    }
  ],
  "servers": {
    "mcp-bridge": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "silverbullet-ai-mcp"
      ],
      "env": {
        "SB_URL": "your-value",
        "SB_AUTH_TOKEN": "${input:sb_auth_token}"
      }
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

## Environment variables

- `SB_URL` (required): Base URL of your SilverBullet server, or 'desktop' for the SilverBullet+ desktop app
- `SB_AUTH_TOKEN` (secret): The server's SBAUTHTOKEN, if it runs with token auth
- `SB_SPACE_ID`: In desktop mode, which space to connect to

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