Procheiron MCP Server

What the code does

We read the source, 2 d ago · rules 995398eba69f

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.

    proc = subprocess.run(cmd, capture_output=True, text=True)

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.

    return _parse(subprocess.run(cmd, capture_output=True, text=True, env=env, timeout=120))

    env = dict(os.environ)

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 procheiron -- uvx procheiron

{
  "mcpServers": {
    "procheiron": {
      "command": "uvx",
      "args": [
        "procheiron"
      ]
    }
  }
}

[mcp_servers.procheiron]
command = "uvx"
args = ["procheiron"]

{
  "mcpServers": {
    "procheiron": {
      "command": "uvx",
      "args": [
        "procheiron"
      ]
    }
  }
}

{
  "servers": {
    "procheiron": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "procheiron"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: PROCHEIRON_SIGNING_KEY (Optional ed25519 private key hex for signed authorship (requires the 'crypto' extra). Mint one with `procheiron keygen`. Omit for tamper-evidence without signatures).