MCP Defender
npxStandardMCP Defender scans and blocks malicious MCP traffic in AI apps like Cursor, Claude, VS Code, and Windsurf. It provides real-time monitoring and filtering of MCP messages. It connects to AI apps via their MCP interfaces. Developers use it to secure AI app communication from malicious attacks.
245390Updated 5 months ago
Overview
MCP Defender scans and blocks malicious MCP traffic in AI apps like Cursor, Claude, VS Code, and Windsurf. It provides real-time monitoring and filtering of MCP messages. It connects to AI apps via their MCP interfaces. Developers use it to secure AI app communication from malicious attacks.
Installation
1Install the package
npx
npx -y mcp-defender2Add to Claude
Add this configuration to your claude_desktop_config.json:
claude_desktop_config.json
{
"mcpServers": {
"mcp-defender-mcp-defender-github": {
"command": "npx",
"args": [
"-y",
"npx -y mcp-defender"
]
}
}
}3Verify installation
Restart Claude Desktop, then ask:
"What tools do you have available from MCP Defender?"
Prerequisites
- Node.js 18 or higher
- npm or npx available
- Claude Desktop or Claude API access
Configuration
No configuration required. This server works out of the box.
Usage Examples
List Resources
"What resources are available in MCP Defender?"
Claude will query available resources and return a list of what you can access.
Get Details
"Show me details about [specific item] in MCP Defender"
Claude will fetch and display detailed information about the requested item.
Create New
"Create a new [item] in MCP Defender with [details]"
Claude will use the appropriate tool to create the resource and confirm success.
Works with MCP Defender
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