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Sympathy-MCP

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MCP server for puppeteering VMs via SSH — sympathetic magic for agent infrastructure

Sympathy-MCP

MCP server for Incus VM operations. Named for sympathetic magic — the connection between puppet and puppeteer.

Agents on masternode puppeteer VMs via structured MCP tools instead of freeform Bash commands.

Tools

Tool Description
vm_exec Run a command inside a VM (stdout, stderr, exit code)
vm_file_read Read a file from inside a VM
vm_file_write Write content to a file inside a VM
vm_file_push Push a file from host into a VM
vm_file_pull Pull a file from a VM to host
vm_snapshot Create a named snapshot
vm_restore Restore to a named snapshot
vm_status Get VM state, IP, resource usage
vm_list List all VMs with status

Usage

# Run the MCP server (stdio transport)
uv run python -m sympathy_mcp

# Or via entry point
uv run sympathy-mcp

MCP Configuration

Add to .mcp.json:

{
  "mcpServers": {
    "sympathy-mcp": {
      "command": "uv",
      "args": ["run", "--project", "/path/to/Sympathy-MCP", "sympathy-mcp"]
    }
  }
}

Requirements

  • Python 3.12+
  • incus CLI installed and configured
  • uv for project management

Architecture

  • src/sympathy_mcp/incus.py — Async Incus CLI wrapper (validation, subprocess exec, structured results)
  • src/sympathy_mcp/server.py — FastMCP server with 9 tools (stdio transport)

Shells out to incus CLI under the hood. Go rewrite planned.

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