String Tools MCP Server

@rog0x/mcp-string-tools

Advanced string manipulation tools for AI agents, served over the Model Context Protocol (MCP).

Tools

analyze_string

Analyze text to get detailed metrics:

• Character count (with and without spaces)
• Word, sentence, and paragraph counts
• Estimated reading time
• Flesch-Kincaid reading level score and grade
• Unique word count and most common words
• Longest word

transform_string

Transform text with various operations:

• remove_duplicate_lines - Remove duplicate lines from text
• remove_extra_whitespace - Collapse extra whitespace and blank lines
• extract_emails - Extract all email addresses from text
• extract_urls - Extract all URLs from text
• extract_phone_numbers - Extract phone numbers from text
• mask_sensitive_data - Mask emails, phone numbers, and credit card numbers
• truncate - Truncate text with ellipsis at word boundaries
• wrap_text - Wrap text at a specified column width

diff_strings

Compare two strings and see the differences:

• character mode - Character-by-character diff
• word mode - Word-by-word diff (default)
• line mode - Line-by-line diff
• Shows additions, deletions, and unchanged segments with positions

render_template

Simple template engine:

• Replace {{variables}} with values from a JSON data object
• Conditionals: {{#if var}}...{{#else}}...{{/if}}
• Loops: {{#each arr}}...{{this}}...{{@index}}...{{/each}}
• Nested property access: {{user.name}}

generate_slug

Generate URL-friendly slugs:

• Transliterates accented characters (e.g., cafe from cafe)
• Removes special characters
• Configurable separator (default: -)
• Optional max length with clean truncation
• Optional lowercase toggle

Setup

npm install
npm run build

Usage with Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "string-tools": {
      "command": "node",
      "args": ["D:/products/mcp-servers/mcp-string-tools/dist/index.js"]
    }
  }
}

License

MIT