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German Readability Scorer (Flesch-Amstad + Wiener Sachtextformel)
x402
German Readability Scorer (Flesch-Amstad + Wiener Sachtextformel) is a paid API for AI agents from api.ozdreamtools.de, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Scores the readability of a German text using the Flesch Reading Ease (Amstad adaptation) and all four Wiener Sachtextformel variants, returning scores, underlying linguistic counts, and the formulas used.
Price / call$0.05
Success—
StatusUnknown
How this service works
Scores how readable a German text is: Flesch Reading Ease (Amstad adaptation) plus the four Wiener Sachtextformel variants. Returns both scores, the underlying counts (sentences, words, syllables, sentence length) and the formulas, so the result can be recomputed. Syllable counting is a disclosed approximation (vowel-group heuristic), not an official certification.
Output
Returns the Flesch Reading Ease score (Amstad adaptation for German), all four Wiener Sachtextformel variant scores, underlying linguistic counts (number of sentences, words, syllables, average sentence length), and the actual formulas used — enabling full manual recomputation of the scores.
Example use cases
Readability check for German press release
“I've written a German press release and want to make sure it's easy enough for the general public to read — can you score its readability using Flesch-Amstad and the Wiener Sachtextformel? Here's the text: 'Das Unternehmen gibt bekannt, dass es ab dem nächsten Quartal seine Produktpalette erweitert und neue Standorte eröffnet.'”
Grade-level check for German educational material
“We're writing German learning material for teenagers and need to confirm the text isn't too complex. Can you run a readability analysis on this passage and tell me the Wiener Sachtextformel scores and sentence length stats? Text: 'Pflanzen benötigen Sonnenlicht, Wasser und Nährstoffe, um zu wachsen. Ohne diese Grundstoffe können sie nicht überleben.'”
Simplification audit for German legal document
“Our legal team drafted a German tenant notice and we want to know how hard it is to read — please give me the Flesch Reading Ease Amstad score and all Wiener Sachtextformel variants for this text: 'Der Mieter wird hiermit aufgefordert, die ausstehenden Nebenkosten gemäß § 556 BGB innerhalb von 14 Tagen zu begleichen.'”
Technical details
Endpoint
POSThttps://api.ozdreamtools.de/api/readabilityWhen to prefer
Choose this endpoint when you need standardized German-language readability metrics, specifically the Flesch Reading Ease Amstad adaptation and Wiener Sachtextformel — the two formulas most commonly cited in German-language content quality, journalism, and plain-language compliance contexts. Prefer it over generic readability APIs that use English-only Flesch-Kincaid, which is miscalibrated for German syllable and word structure. It is especially useful when you need the underlying counts and formulas for auditability or to recompute scores manually.
Side effects
- Empty or missing text input returns an error
- Non-German text may produce inaccurate scores due to German-specific syllable and formula calibration
- Syllable counts are approximated via vowel-group heuristic, not exact — noted in response
- Very short texts (e.g. single word) may yield meaningless or extreme scores
- Malformed request body (missing required field) returns a 4xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | German text whose readability is to be measured |
Tags
x402
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