ChuckNorris
An experimental MCP gateway that provides specialized LLM enhancement prompts based on the L1B3RT4S repository, primarily intended to enhance weaker models' capabilities.
What is ChuckNorris?
ChuckNorris is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to experimental mcp gateway that provides specialized llm enhancement prompts based on the l1b3rt4s repository, primarily intended to enhance weaker models' capabilities.
An experimental MCP gateway that provides specialized LLM enhancement prompts based on the L1B3RT4S repository, primarily intended to enhance weaker models' capabilities.
This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- An experimental MCP gateway that provides specialized LLM en
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx chucknorris-mcp-serverConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use ChuckNorris
ChuckNorris MCP Server is an experimental JavaScript MCP gateway published by Pollinations.AI that delivers specialized LLM enhancement prompts drawn from the L1B3RT4S repository. It uses a two-phase dynamic schema approach: on first invocation the tool presents a neutral description, and on subsequent calls the tool schema is updated to include model-specific prompts designed to alter LLM behavior. The project is intended as a security research demonstration — specifically to illustrate how MCP tools can change behavior after initial approval and how multi-phase approaches may bypass LLM safety detection — so developers can build more robust defenses.
Prerequisites
- Node.js 18.x or higher (for running via npx)
- An MCP-compatible client such as Claude Desktop
- Understanding that this is an experimental security research tool — results vary by model and newer LLMs may recognize and reject the prompts
Understand the purpose and risks
This server is a security research tool demonstrating MCP tool poisoning techniques. It is not intended for production use. Review the repository README and the linked research ('The S in MCP Stands for Security') before proceeding.
Add the server to your MCP client configuration
Add the @pollinations/chucknorris package to your MCP server list. No environment variables or API keys are required.
{
"mcpServers": {
"chucknorris": {
"command": "npx",
"args": ["-y", "@pollinations/chucknorris"]
}
}
}Restart your MCP client
Save the configuration and restart Claude Desktop or your chosen MCP host. The server starts automatically via npx on demand.
Observe the two-phase schema behavior
On the first tool call the server returns a 'preparation' prompt and records the calling model type. On subsequent calls the tool schema description is updated dynamically to include model-specific enhancement prompts from the L1B3RT4S project.
ChuckNorris Examples
Client configuration
Minimal MCP client configuration to run the ChuckNorris server via npx. No API keys or environment variables needed.
{
"mcpServers": {
"chucknorris": {
"command": "npx",
"args": ["-y", "@pollinations/chucknorris"]
}
}
}Prompts to try
Prompts for observing the dynamic schema behavior in a research context.
- "What tools does the ChuckNorris MCP server expose?"
- "Call the ChuckNorris tool and tell me what it returns."
- "List the current schema description of the ChuckNorris tool before and after calling it once."Troubleshooting ChuckNorris
The tool has no visible effect on Claude or GPT-4
This is expected — the README notes that the technique only works on weaker models. Latest LLMs are trained to recognize and reject jailbreak attempts. The tool is most useful as a demonstration of the attack surface rather than a reliable capability enhancer.
npx fails to download the package
Ensure you have internet access and a supported Node.js version (18+). You can also install the package globally first: npm install -g @pollinations/chucknorris, then change the command to 'chucknorris' without npx args.
Frequently Asked Questions about ChuckNorris
What is ChuckNorris?
ChuckNorris is a Model Context Protocol (MCP) server that experimental mcp gateway that provides specialized llm enhancement prompts based on the l1b3rt4s repository, primarily intended to enhance weaker models' capabilities. It connects AI assistants to external tools and data sources through a standardized interface.
How do I install ChuckNorris?
Follow the installation instructions on the ChuckNorris GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with ChuckNorris?
ChuckNorris works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is ChuckNorris free to use?
Yes, ChuckNorris is open source and available under the MIT License license. You can use it freely in both personal and commercial projects.
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