Koskamo

Code Firewall MCP

A structural similarity-based code security filter for MCP that blocks dangerous code patterns before they reach execution tools. It parses code into a concrete syntax tree, normalizes it to a structural skeleton, embeds it via Ollama, and compares it against a blacklist in ChromaDB to block or allow execution.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Code Firewall MCP logo, by egoughnourCommunity listingLocal stdioSource reviewed; not executedPublished by egoughnour
Vendor documentation

What you can do with it

  • Block dangerous code patterns before execution
  • Compare code structure against a blacklist of known-bad patterns
  • Parse code to Concrete Syntax Tree using tree-sitter
  • Embed normalized structure via Ollama for similarity checks

Source and maintenance

Community listingRegistry 0.7.0MIT
mcp-registry: io.github.egoughnour/code-firewall-mcp@0.7.0Source repository
Last repository push
Latest release
v0.7.0
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

code-firewall-mcp 0.7.0

pypi
code-firewall-mcp package definition
{
  "version": "0.7.0",
  "transport": "stdio",
  "identifier": "code-firewall-mcp",
  "registryType": "pypi",
  "environmentVariables": [
    {
      "name": "FIREWALL_DATA_DIR",
      "format": "string",
      "description": "Directory for storing ChromaDB data"
    },
    {
      "name": "OLLAMA_URL",
      "format": "string",
      "description": "URL for Ollama server (default: http://localhost:11434)"
    },
    {
      "name": "EMBEDDING_MODEL",
      "format": "string",
      "description": "Ollama embedding model (default: nomic-embed-text)"
    },
    {
      "name": "SIMILARITY_THRESHOLD",
      "format": "string",
      "description": "Block threshold 0-1 (default: 0.85)"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "code-firewall-mcp-mcp": {
      "command": "uvx",
      "args": [
        "code-firewall-mcp==0.7.0"
      ],
      "env": {
        "FIREWALL_DATA_DIR": "<YOUR_FIREWALL_DATA_DIR>",
        "OLLAMA_URL": "<YOUR_OLLAMA_URL>",
        "EMBEDDING_MODEL": "<YOUR_EMBEDDING_MODEL>",
        "SIMILARITY_THRESHOLD": "<YOUR_SIMILARITY_THRESHOLD>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "code-firewall-mcp-mcp": {
      "command": "uvx",
      "args": [
        "code-firewall-mcp==0.7.0"
      ],
      "env": {
        "FIREWALL_DATA_DIR": "<YOUR_FIREWALL_DATA_DIR>",
        "OLLAMA_URL": "<YOUR_OLLAMA_URL>",
        "EMBEDDING_MODEL": "<YOUR_EMBEDDING_MODEL>",
        "SIMILARITY_THRESHOLD": "<YOUR_SIMILARITY_THRESHOLD>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "code-firewall-mcp-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "code-firewall-mcp==0.7.0"
      ],
      "env": {
        "FIREWALL_DATA_DIR": "<YOUR_FIREWALL_DATA_DIR>",
        "OLLAMA_URL": "<YOUR_OLLAMA_URL>",
        "EMBEDDING_MODEL": "<YOUR_EMBEDDING_MODEL>",
        "SIMILARITY_THRESHOLD": "<YOUR_SIMILARITY_THRESHOLD>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "code-firewall-mcp-mcp": {
      "command": "uvx",
      "args": [
        "code-firewall-mcp==0.7.0"
      ],
      "env": {
        "FIREWALL_DATA_DIR": "<YOUR_FIREWALL_DATA_DIR>",
        "OLLAMA_URL": "<YOUR_OLLAMA_URL>",
        "EMBEDDING_MODEL": "<YOUR_EMBEDDING_MODEL>",
        "SIMILARITY_THRESHOLD": "<YOUR_SIMILARITY_THRESHOLD>"
      }
    }
  }
}

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