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io.github.rog0x/string

Official registry AI and agents

String analyzer, diff, templates for AI agents

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @rog0x/mcp-string-tools
Claude Code 
claude mcp add string -- npx -y @rog0x/mcp-string-tools@1.0.2
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "string": {
            "command": "npx",
            "args": [
                "-y",
                "@rog0x/mcp-string-tools@1.0.2"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. @rog0x/mcp-string-tools
  2. Tools
  3. Setup
  4. Usage with Claude Desktop
  5. License

@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

Frequently asked questions

What is io.github.rog0x/string?

String analyzer, diff, templates for AI agents

How do I install io.github.rog0x/string?

It runs on your machine. In Claude Code: claude mcp add string -- npx -y @rog0x/mcp-string-tools@1.0.2. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.rog0x/string need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.rog0x/string open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains io.github.rog0x/string?

It is published by rog0x. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.