Updated 17 August 2026

SW Toolbox MCP

SW Toolbox MCP is a local tool hub for Cursor and Claude. Your agent calls file tools on your computer instead of writing a script. Your files never leave your device.

• Anyone can install the hub.
• Without a Pro key it only exposes compress_image.
• The hub does not upload files to us.

Buy Pro — $15 oncePolar checkout. Paste the SW-TBX- key into the Agent tab.

1. Start from the Chrome extension

Chrome cannot spawn Node itself. Run this once (copy the command from the Agent tab — it includes your extension id), then click Start hub:

npx -y github:simonwong201293/tools-mcp install-host --extension-id=YOUR_EXTENSION_ID

After Start, paste this HTTP config so Cursor uses the process the extension already launched:

{
  "mcpServers": {
    "sw-toolbox": {
      "url": "http://127.0.0.1:17321/mcp"
    }
  }
}

2. Or let Cursor spawn the hub

Cursor: Settings → MCP, or .cursor/mcp.json. Claude Desktop: claude_desktop_config.json. Claude Code: project .mcp.json.

{
  "mcpServers": {
    "sw-toolbox": {
      "command": "npx",
      "args": ["-y", "github:simonwong201293/tools-mcp"],
      "env": {
        "SW_TOOLS_GROUPS": "images",
        "SW_TOOLBOX_KEY": "SW-TBX-your-pro-key"
      }
    }
  }
}

Set SW_TOOLS_GROUPS to images, pdf, data, or a comma list. That is how you keep tool-schema tokens down.

3. What the agent can call

• images — compress_image, convert_image, resize_image, strip_exif, heic_convert
• pdf — merge_pdf, split_pdf, images_to_pdf
• data — format_json, view_csv, make_qr, color_palette

FAQ

Chrome extension Agent tab: tool directory. Privacy: Privacy Policy.