Rosetta MCP Server

What the code does

We read the source, 23 min ago · rules 3dff92dd89df

A value the model can set ends up inside a file or shell call. That is not a flaw by itself — for a terminal server it is the job — but it is where things go wrong when it is not.

            const proc = spawn(py, ['-c', script], {

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

            const proc = spawn(py, ['-c', script]);

                    if (match) return path.join(p, match);

        const iconB64 = 'iVBORw0KGgoAAAANSUhEUgAAAgAAAAIACAYAAAD0eNT6AAAJcUlEQVR4nO3YsW3jWhRFUfqDVQiMVYg6UBkMVIIil8BAZbgDFuJ4MLkTB078u5gb7LUaeAeUDWzct5/vr98FAEj5b3oAAPDvCQAACBIAABAkAAAgSAAAQJAAAIAgAQAAQQIAAIIEAAAECQAACBIAABAkAAAgSAAAQJAAAIAgAQAAQQIAAIIEAAAECQAACBIAABAkAAAgSAAAQJA…

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add rosetta-mcp-server -- npx -y rosetta-mcp-server

{
  "mcpServers": {
    "rosetta-mcp-server": {
      "args": [
        "-y",
        "rosetta-mcp-server"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.rosetta-mcp-server]
command = "npx"
args = ["-y", "rosetta-mcp-server"]

{
  "mcpServers": {
    "rosetta-mcp-server": {
      "args": [
        "-y",
        "rosetta-mcp-server"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "rosetta-mcp-server": {
      "args": [
        "-y",
        "rosetta-mcp-server"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: ROSETTA_BIN (Path to rosetta_scripts binary or its directory), PYTHON_BIN (Python interpreter with PyRosetta/Biotite installed), MCP_DEBUG (Set to 1 for debug logging). The author declared them in the registry entry; get the values from the project itself.