Unicode Steganography Puzzles MCP server

The Unicode Puzzles MCP Server is a specialized tool for handling hidden messages using various Unicode manipulation techniques. This server provides functionality for steganography, detecting potential scams, bypassing text formatting restrictions, and creating text puzzles through Unicode character tricks.

Installation

To install and set up the Unicode Puzzles MCP server:

1. First, add the server configuration to your Claude desktop configuration file:

{
  "mcpServers": {
    "unicode-puzzles": {
      "command": "node",
      "args": ["/path/to/unicode-puzzles-mcp/src/server/index.js"]
    }
  }
}

2. Install the required dependencies:

npm install

3. Run the demo to verify functionality:

node mega_unicode_demo.js

Usage Examples

The Unicode Puzzles MCP server provides several techniques for text manipulation:

Homoglyph Detection

Detect visually identical characters from different alphabets that can be used in phishing attempts:

// Example: "Microsoft" appears identical but uses different Unicode characters
"Microsoft" → "м𝒊сго𝓼𝑜ƒτ"

Combining Marks

Add invisible accents and combining characters to text:

// Adding combining marks to regular text
"Hello" → "H̺e̗l̔l̲o̿"

Bidirectional Text Manipulation

Use Right-to-Left (RTL) and Left-to-Right (LTR) text overrides:

// Reversing text direction
"deployed" → "‮deployed‬"

Whitespace Encoding

Utilize the 16 different types of spaces in Unicode for encoding information:

// Different spaces can carry hidden information
// (Visual representation not possible in this example)

Variation Selectors

Use emoji modifiers to hide data:

// Adding variation selectors to characters
// (Visual effect depends on font rendering)

Security Considerations

These Unicode manipulation techniques can potentially be used for:

• Bypassing text filters
• Creating convincing phishing attempts
• Hiding malicious content
• Steganographic communication

Important: This tool should only be used responsibly for security testing, educational purposes, and legitimate applications.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "unicode-puzzles" '{"command":"node","args":["/path/to/unicode-puzzles-mcp/src/server/index.js"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "unicode-puzzles": {
            "command": "node",
            "args": [
                "/path/to/unicode-puzzles-mcp/src/server/index.js"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "unicode-puzzles": {
            "command": "node",
            "args": [
                "/path/to/unicode-puzzles-mcp/src/server/index.js"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect