How do I install the code mcp server?

Use a recorded configuration for your client, replace example credential values and paths, and verify the documented runtime. Restart or reconnect the client, then inspect the available tools.

What credentials does it need?

It reads `FIREWALL_DATA_DIR`, `OLLAMA_URL` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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Code MCP Server

Structural similarity-based code filter. Stops malicious code pattern reaching execution tools.

Local serverstdioPython

What is the Code MCP Server?

Structural similarity-based code filter. Stops malicious code pattern reaching execution tools.

What the server does

A structural similarity-based code security filter for MCP (Model Context Protocol). Blocks dangerous code patterns before they reach execution tools by comparing code structure against a blacklist of known-bad patterns.

Credentials and setup notes

Python 3.10+ (< 3.14 due to onnxruntime compatibility) - Ollama (for embeddings) - ChromaDB (for vector storage) - tree-sitter (optional, for better parsing)

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

Tool	What it does
firewall_system_check	Check system requirements — verify macOS, Apple Silicon, RAM
firewall_setup_ollama	Install via Homebrew — managed service, auto-updates
firewall_setup_ollama_direct	Install via direct download — no sudo, fully headless
firewall_ollama_status	Check Ollama availability — verify embeddings are ready
firewall_check	Check if a code file is safe to execute
firewall_check_code	Check code string directly (no file required)
firewall_blacklist	Add a dangerous pattern to the blacklist
firewall_record_delta	Record near-miss variants for classifier sharpening
firewall_list_patterns	List patterns in blacklist or delta collection
firewall_remove_pattern	Remove a pattern from blacklist or deltas
firewall_status	Get firewall status and statistics

How to install the Code MCP Server

{
  "mcpServers": {
    "code-firewall": {
      "command": "uvx",
      "args": ["code-firewall-mcp"],
      "env": {
        "FIREWALL_DATA_DIR": "your-value",
        "OLLAMA_URL": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

Python 3.10+ (< 3.14 due to onnxruntime compatibility) - Ollama (for embeddings) - ChromaDB (for vector storage) - tree-sitter (optional, for better parsing)

Variable	Description	Required
FIREWALL_DATA_DIR	Filesystem location the server is allowed to use.	Optional
OLLAMA_URL	Endpoint or connection string the server talks to.	Yes

Example prompts to try

“Use Code to firewall system check.”
“Use Code to firewall setup ollama.”
“Use Code to firewall setup ollama direct.”

Frequently asked questions

Structural similarity-based code filter. Stops malicious code pattern reaching execution tools. Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.