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Utilerio
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Readability Score Checker

POST/api/v1/tools/readability-score-checker

Get a Flesch Reading Ease score and grade level for English text, or an Ateşman score for Turkish.

Authentication

Requires an API key in the X-API-Key header.

Try it

POST/api/v1/tools/readability-score-checker

Parameters

textstringrequired

Text to score.

langstringoptional

en uses Flesch Reading Ease, tr uses the Ateşman formula. Default en.

entr

Request body

{
  "text": "This is a simple sentence. It is easy to read.",
  "lang": "en"
}

Response codes

  • 200Success.
  • 400Invalid request — check your body or parameters.
  • 401Missing or invalid API key.
  • 403The API key is not scoped to this endpoint.
  • 429Rate limit exceeded — retry after a short wait.

Language

cURL

Request

curl -X POST https://utilerio.com/api/v1/tools/readability-score-checker \
  -H "X-API-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"This is a simple sentence. It is easy to read.","lang":"en"}'

Response

{ "score": 100.6, "grade": 1.5, "wordCount": 10, "sentenceCount": 2, "wordsPerSentence": 5, "syllablesPerWord": 1.2 }