Readability Analysis MCP Server

A Model Context Protocol (MCP) server that provides comprehensive text readability analysis using multiple established metrics. Built with FastMCP and Pydantic for reliable, structured analysis.

Features

• Multiple Readability Metrics: Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, ARI, and Coleman-Liau Index
• Text Statistics: Word count, sentence count, character count, syllable count, and estimated reading time
• Sentiment Analysis: Polarity and subjectivity analysis using TextBlob
• Intelligent Interpretations: Human-readable explanations and improvement recommendations
• Structured Output: JSON responses with Pydantic models for reliable parsing

All Platforms Configuration

Edit your Claude Desktop config file:

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

{
  "mcpServers": {
    "readability": {
      "command": "uvx",
      "args": ["readability-mcp"]
    }
  }
}

Usage Examples

Once configured, restart Claude Desktop and you can use the readability tools directly in conversation:

Quick Readability Check

Can you analyze the readability of this text:
"The implementation of advanced algorithmic methodologies necessitates comprehensive evaluation protocols to ensure optimal performance characteristics across diverse operational parameters."

Claude will use your analyze_readability tool and provide structured analysis.

Sentiment Analysis

What's the sentiment of this customer feedback:
"I absolutely love this product! It's incredibly easy to use and has made my workflow so much more efficient."

Claude will use your analyze_sentiment tool.

Specific Metrics

What's the Flesch Reading Ease score for my blog post draft?
[paste your content]

Claude will use your flesch_reading_ease tool.

Integration Benefits

1. Seamless Experience: Tools appear as native Claude capabilities
2. Structured Analysis: Pydantic models ensure consistent, parseable responses
3. Multi-tool Workflow: Claude can chain multiple readability tools together
4. Context Aware: Claude can provide writing suggestions based on your analysis

Example Workflow

You: "Help me improve this paragraph for a general audience"

Claude: First, let me analyze the current readability... [Uses analyze_readability tool]

Based on the analysis showing a Flesch-Kincaid grade level of 14.2 (college level), here are some suggestions to make it more accessible:

1. Break up the 45-word sentence into 2-3 shorter ones
2. Replace "methodologies" with "methods"
3. Simplify "necessitates" to "requires"

You: "Can you rewrite it and check the new version?"

Claude: [Rewrites the text, then uses analyze_readability again to verify improvement]

Usage

Available Tools

analyze_readability(text: str)

Comprehensive analysis including all metrics, statistics, sentiment, and recommendations.

Example:

{
  "flesch_reading_ease": 65.2,
  "flesch_kincaid_grade": 8.1,
  "gunning_fog": 10.3,
  "smog_index": 9.8,
  "automated_readability_index": 8.7,
  "coleman_liau_index": 9.2,
  "reading_time_seconds": 45.6,
  "text_stats": {
    "sentence_count": 5,
    "word_count": 87,
    "character_count": 456,
    "syllable_count": 132
  },
  "sentiment": {
    "polarity": 0.2,
    "subjectivity": 0.4,
    "interpretation": "Positive tone, moderately subjective"
  },
  "interpretation": {
    "flesch_ease_interpretation": "Standard (8th-9th grade level)",
    "overall_difficulty": "High School",
    "recommendations": ["Text readability is good!"]
  }
}

flesch_reading_ease(text: str)

Returns only the Flesch Reading Ease score with interpretation.

flesch_kincaid_grade(text: str)

Returns only the Flesch-Kincaid Grade Level.

analyze_sentiment(text: str)

Returns sentiment analysis with polarity, subjectivity, and interpretation.

Readability Metrics Explained

Reading Ease Interpretations

• 90-100: Very Easy (5th grade)
• 80-89: Easy (6th grade)
• 70-79: Fairly Easy (7th grade)
• 60-69: Standard (8th-9th grade)
• 50-59: Fairly Difficult (10th-12th grade)
• 30-49: Difficult (college level)
• 0-29: Very Difficult (graduate level)

License

MIT