Code Firewall MCP Server

What the code does

We read the source, 18 h 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.

                install_proc = subprocess.run(

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 code-firewall-mcp -- uvx code-firewall-mcp

{
  "mcpServers": {
    "code-firewall-mcp": {
      "args": [
        "code-firewall-mcp"
      ],
      "command": "uvx"
    }
  }
}

[mcp_servers.code-firewall-mcp]
command = "uvx"
args = ["code-firewall-mcp"]

{
  "mcpServers": {
    "code-firewall-mcp": {
      "args": [
        "code-firewall-mcp"
      ],
      "command": "uvx"
    }
  }
}

{
  "mcpServers": {
    "code-firewall-mcp": {
      "args": [
        "code-firewall-mcp"
      ],
      "command": "uvx"
    }
  }
}

This one needs environment variables set before it will start: FIREWALL_DATA_DIR (Directory for storing ChromaDB data), OLLAMA_URL (URL for Ollama server (default: http://localhost:11434)), EMBEDDING_MODEL (Ollama embedding model (default: nomic-embed-text)), SIMILARITY_THRESHOLD (Block threshold 0-1 (default: 0.85)). The author declared them in the registry entry; get the values from the project itself.