Readability Calculator MCP tool

MCP findutils:readability_calculator

Compute six readability scores for English text (Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau, Automated Readability Index) plus an average grade level, a reading-level label, a target audience, and text statistics. Scores are null when the text has fewer than 10 words.

Needs an API key. Running a tool needs an API key. Keys are not for sale yet: ask for early access. About API keys

Open the tool Try it

Arguments

application/json

text

string required

The text to analyse (at least 10 words for scores).

Example arguments

Verified

{
  "text": "The cat sat on the mat. The dog sat on the rug. Both were happy."
}

claude mcp add findutils --transport http https://mcp.findutils.com/ --header "Authorization: Bearer YOUR_API_KEY"

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

curl -X POST https://mcp.findutils.com/ \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "readability_calculator",
      "arguments": {
        "text": "The cat sat on the mat. The dog sat on the rug. Both were happy."
      }
    }
  }'

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/readability-calculator/execute.

REST reference

Rate limit: 120 a minute, per IP
Auth: API key
REST id: readability-calculator
MCP name: readability_calculator
Category: Text
Machine-readable: openapi.json · markdown.md

Arguments

Example arguments

More Text tools

More to explore