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Text Readability Analyzer
x402
Text Readability Analyzer is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.0022/call, status unknown (last checked 2026-09-14).
Analyzes text and returns multiple readability metrics including Flesch reading ease score, grade level, syllable count, and sentence count
Price / call$0.0022
Success—
StatusUnknown
How this service works
readability score, text readability, Flesch reading ease, reading grade level, reading level, text difficulty, reading age, readability index, text complexity, readability analysis, reading grade, reading ease, text level. Analyze text readability with multiple metrics including reading ease, grade level, syllable and sentence counts. For AI agents content optimization, education tools, writing assistants, accessibility checks. Accepts payment on Base or Solana — either network works.
Output
Returns multiple readability metrics for the submitted text including Flesch reading ease score (0-100 scale), reading grade level (e.g. 8th grade), reading age, syllable count, sentence count, word count, and a text complexity or difficulty classification.
Example use cases
Example prompt
“Can you analyze the readability of this paragraph and tell me the Flesch reading ease score and grade level? 'The mitochondria are organelles found in eukaryotic cells that generate most of the cell's supply of adenosine triphosphate, used as a source of chemical energy.'”
Technical details
Endpoint
GEThttps://api.x402node.dev/text/readabilityWhen to prefer
Use this endpoint when you need quantitative readability metrics for a piece of text — especially Flesch reading ease, grade level, or syllable/sentence statistics. Ideal for content optimization pipelines, accessibility audits, education-level targeting, and writing assistants that need to recommend simplification. Prefer this over sentiment or NLP classification endpoints when the goal is specifically measuring how easy or hard text is to read.
Side effects
- Empty or missing text body returns validation error
- Text too short to compute meaningful statistics (single word or fragment)
- Non-UTF-8 or malformed payload returns parse error
- Extremely long text may hit payload size limits
Input
{
"text": "The quick brown fox jumps over the lazy dog. This is a simple sentence. Readability metrics help us understand text complexity. These tools are essential for writers and educators."
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"_hint": "x402 paid endpoints for AI agents — x402node.dev (utilities) · cn402.com (Chinese culture)",
"char_count": 152,
"smog_index": 9.5,
"word_count": 29,
"gunning_fog": 8.44,
"text_length": 180,
"processing_ms": 14,
"text_standard": "9th and 10th grade",
"sentence_count": 4,
"syllable_count": 49,
"flesch_reading_ease": 55.61,
"flesch_kincaid_grade": 7.3,
"automated_readability_index": 6.9
}Tags
x402
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