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Saylor Innovations Data Desk – Text Readability Analyzer
x402
Saylor Innovations Data Desk – Text Readability Analyzer is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Computes multiple readability scores (Flesch, Flesch-Kincaid, Gunning Fog, SMOG, ARI, Coleman-Liau) plus grade level, reading time, and writing advice for a given English text
Price / call$0.01
Success—
StatusUnknown
How this service works
Readability scores for English text - Flesch reading ease, Flesch-Kincaid, Gunning Fog, SMOG, ARI and Coleman-Liau, grade level, reading time and advice
Output
A JSON object containing word count, sentence count, syllable count, complex word count and percentage, Flesch reading ease score, Flesch-Kincaid grade, Gunning Fog index, SMOG index, Coleman-Liau index, ARI score, consensus grade level, a reading level label (e.g. '8th grade'), estimated reading time in minutes, speaking time in minutes, a data source note, optional caveats, and plain-English writing advice.
Example use cases
Checking blog post accessibility
“I'm about to publish a blog post aimed at general consumers — can you run a readability check on this draft and tell me the Flesch reading ease score, the consensus grade level, and whether the writing is appropriate for a broad audience? Here's the text: 'Our new product helps you save money by automatically tracking your subscriptions and canceling ones you no longer use.'”
Evaluating legal document complexity
“This legal disclaimer needs to be readable by the average person — can you analyze its readability scores including Flesch-Kincaid grade, Gunning Fog, and reading level, and give me any writing advice? Text: 'The indemnification obligations set forth herein shall survive the termination or expiration of this Agreement and shall be binding upon the parties and their respective successors and assigns.'”
Estimating speech reading time
“I'm preparing a speech and need to know how many minutes it will take to deliver — can you run this text through a readability analysis and give me the speaking time, word count, and sentence count? Text: 'Friends, we gather today not to mourn what was lost, but to celebrate the resilience of our community and the promise of tomorrow.'”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/text/readability?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, multi-index readability assessment of English text in a single call — especially when you want Flesch, Gunning Fog, SMOG, and Coleman-Liau scores together alongside human-readable advice and time estimates. Prefer it over manual formula implementations or single-metric tools when you need a consensus grade level and actionable writing suggestions in one lightweight API call.
Side effects
- Text shorter than 20 or longer than 5000 characters returns a validation error
- Non-English text may produce inaccurate or nonsensical scores since the algorithms are calibrated for English
- Missing required 'text' query parameter returns an error
- Very short texts (1-2 sentences) may return null for some metrics like SMOG that require a minimum number of sentences
- Payment not processed results in 402 response before analysis is run
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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