String

io.github.rog0xPublished by GitHub account rog0xv1.0.2Updated Oct 27, 2026

String analyzer, diff, templates for AI agents

VerifiedSTDIODesktop onlyDeveloper ToolsData & Analytics

Overview

AI-generated overview

Local MCP server that gives an assistant text tools: string analysis, transforms, diffs, template rendering and slug generation.

What you can do
  • Analyze text: character, word, sentence and paragraph counts, reading time, Flesch-Kincaid level, unique and common words, longest word
  • Transform text: remove duplicate lines, collapse whitespace, extract emails, URLs and phone numbers, mask sensitive data, truncate, wrap
  • Compare two strings with character, word or line diffs showing additions, deletions and unchanged segments
  • Render templates with variable substitution, conditionals, loops and nested property access
  • Generate URL-friendly slugs with transliteration, configurable separator, optional max length and lowercase
When to use it
Useful when an assistant needs to measure, clean up, compare or reformat text locally, for example checking readability, deduplicating lines, masking emails and card numbers before sharing, diffing two versions of a string, or producing slugs for URLs.
Requirements
Runs as a local stdio process on the desktop; install the npm package and build it, then point the client at the built entry file with node. No accounts, API keys or environment variables are declared.
Before you install
The masking operation is a text transform only; extracted emails, URLs and phone numbers are returned to the assistant, so review output before sharing. No write, network or credential access is declared.

Installation

In SourceWeft

  1. Open String in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

@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

bash
npm installnpm run build

Usage with Claude Desktop

Add to your claude_desktop_config.json:

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

License

MIT

Source: README.md at commit 29a699e

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v1.0.2LatestSep 16, 2026

Score

40% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.