kasra-mcp

Kasra MCP Server — local code review via the Model Context Protocol.

Reads files on your machine and sends them to the Kasra API for security scanning. Designed to work with AI tools like Claude Desktop, Cursor, Claude Code, and any MCP-compatible client.

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Install

pip install kasra-mcp

Requires Python 3.11+.

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Quick Start

# Verify installation
python3 -m kasra_mcp.server --help

The server connects to a Kasra API instance (default: http://localhost:8090).

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Configuration

Environment variables:

Variable	Default	Description
KASRA_API_URL	http://localhost:8090	Kasra API base URL
KASRA_API_KEY	""	API key for authentication

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Tools

kasra_scan_file

Scan a file or directory for security vulnerabilities.

Parameter	Type	Description
path	string	Path to a file or directory to scan

Supports both single files and directories. Ignores common non-source files (images, binaries, .git, node_modules, etc.).

kasra_get_rules

List all loaded security rules.

Parameter	Type	Description
severity	string?	Filter by severity (P0, P1, P2)
enabled_only	boolean?	Only return enabled rules

health

Check the Kasra API connection and engine status.

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Integration with AI Tools

Claude Desktop

{
  "mcpServers": {
    "kasra": {
      "command": "python3",
      "args": ["-m", "kasra_mcp.server"],
      "env": {
        "KASRA_API_URL": "http://localhost:8090",
        "KASRA_API_KEY": "your-api-key-here"
      }
    }
  }
}

Paste this into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Cursor

{
  "mcpServers": {
    "kasra": {
      "command": "python3",
      "args": ["-m", "kasra_mcp.server"],
      "env": {
        "KASRA_API_URL": "http://localhost:8090",
        "KASRA_API_KEY": "your-api-key-here"
      }
    }
  }
}

Claude Code

{
  "mcpServers": {
    "kasra": {
      "command": "python3",
      "args": ["-m", "kasra_mcp.server"],
      "env": {
        "KASRA_API_URL": "http://localhost:8090",
        "KASRA_API_KEY": "your-api-key-here"
      }
    }
  }
}

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How it works

 Claude Desktop / Cursor / Claude Code
        │
        │  stdio (JSON-RPC over stdin/stdout)
        ▼
 ┌─────────────────┐        POST /v1/scan/file     ┌────────────────┐
 │   kasra-mcp     │ ─────────────────────────────→ │  Kasra API     │
 │                 │        POST /v1/rules/export   │  (Docker)      │
 │  reads local    │ ←───────────────────────────── │  193 rules     │
 │  file content   │        findings + results      │  CR scanning    │
 └─────────────────┘                                └────────────────┘

1. Claude Desktop starts kasra-mcp as a subprocess (stdio transport)
2. When the user asks to scan a file, Claude calls kasra_scan_file with a path
3. kasra-mcp reads the file content from local disk
4. Sends the content to the Kasra API via POST /v1/scan/file
5. Kasra API runs 83 code review rules, returns findings
6. kasra-mcp returns the results to Claude

The MCP server never stores your code — it reads, sends, and discards.

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Development

git clone <repo>
cd kasra-mcp
pip install -e .
python3 -m kasra_mcp.server