CyberChef API MCP Server

CyberChef API MCP Server

MCP server enabling LLMs to access CyberChef's powerful data analysis and processing tools.

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CyberChef API MCP Server implements the Model Context Protocol (MCP), interfacing with the CyberChef Server API to provide structured tools and resources for LLM/MCP clients. It exposes key CyberChef operations such as executing recipes, batch processing, retrieving operation categories, and utilizing the magic operation for automated data decoding. The server can be configured and managed via standard MCP client workflows and supports context-driven tool invocation for large language models.

Key Features

Implements Model Context Protocol server interface
Connects to CyberChef Server API
Provides resource endpoints for operation categories
Supports execution of CyberChef recipes
Batch data processing capabilities
Automatic data decoding with magic operation
Client configuration via MCP workflows
Environment variable support for API endpoints
Development workflow with MCP inspector
Demo integration with LLM desktop clients

Use Cases

Enabling LLMs to perform complex data transformations via CyberChef tools
Batch processing of encoded or obfuscated data
Integrating CyberChef's operations into AI-powered workflows
Automating forensic or security data analysis tasks
Developing LLM-based plugins for CyberChef utilities
Rapid prototyping and testing of CyberChef-based pipelines
Retrieving and utilizing updated operation categories for context-aware reasoning
Building conversational agents that require advanced data processing
Streamlining the setup of CyberChef operations in natural language interfaces
Augmenting AI assistants with CyberChef's decoding and analysis capabilities

README

CyberChef API MCP Server

This model context protocol (MCP) server interfaces with the CyberChef Server API. Allowing you to use any LLM/MCP client of your choosing to utilise the tools and resources within CyberChef.

🧰 Available Tools and Resources

  • get_cyberchef_operations_categories: resource - gets updated Cyber Chef categories for additional context / selection of the correct operations
  • get_cyberchef_operation_by_category: resource - gets list of Cyber Chef operations for a selected category
  • bake_recipe: tool - bake (execute) a recipe (a list of operations) in order to derive an outcome from the input data
  • batch_bake_recipe: tool - bake (execute) a recipe (a list of operations) in order to derive an outcome from a batch of input data
  • perform_magic_operation: tool - perform CyberChef's magic operation which is designed to automatically detect how your data is encoded and which operations can be used to decode it

📝 Usage

Start the server using the default stdio transport and specifying an environment variable pointing to a CyberChef API

bash
CYBERCHEF_API_URL="your-cyberchef-api-url" uv run cyberchef_api_mcp_server

🧑‍💻Usage (Development)

Start the server and test it with the MCP inspector

bash
uv add "mcp[cli]"
mcp dev server.py

📚 Client Configuration

The following commands will generate a client configuration file, the location will depend on your operating system

bash
uv add "mcp[cli]"
mcp install server.py --name "CyberChef API MCP Server"

[!TIP] After running the above command you can then tweak the client configuration to include the environment variable for the CyberChef API URL

json
{
 "mcpServers": {
   "CyberChef API MCP Server": {
     "command": "uv",
     "args": [
       "run",
       "--with",
       "mcp[cli]",
       "--directory",
       "cyberchef-api-mcp-server/cyberchef_api_mcp_server/",
       "mcp",
       "run",
       "server.py"
     ],
     "env": {
       "CYBERCHEF_API_URL": "your-cyberchef-api-url"
     }
   }
 }
}

🔍 Demo

Using the MCP server in this example use case, the following prerequisites apply:

  • You must have Claude desktop installed
  • Have a running CyberChef API instance or one you are able to use

Here is a basic prompt being solved using the MCP server tools:

🙇 References

🪪 License

MIT License

Star History

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Repository Owner

slouchd
slouchd

User

Repository Details

Language Python
Default Branch main
Size 27 KB
Contributors 1
License MIT License
MCP Verified Nov 12, 2025

Programming Languages

Python
90.54%
Dockerfile
9.46%

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