{"uid":"cap_y4tkeasW-eGXk4OQsm5BQ","slug":"flesch-readability-scorer-32124eca","name":"Flesch Readability Scorer","description":"Flesch Reading Ease score and Flesch–Kincaid grade level for English text, plus word/sentence/syllable counts.","url":"https://agent402.tools/api/readability","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string"}}},"responseSchema":{"type":"json","example":{"words":9,"sentences":2,"gradeLevel":0.5,"readingEase":100}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_SunMJrwoPwyszXcQ1c6BZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates Flesch Reading Ease score and Flesch–Kincaid grade level for English text, plus word, sentence, and syllable counts.","exampleAgentPrompt":"Can you tell me the Flesch Reading Ease score and grade level for this paragraph: 'The mitochondria is the powerhouse of the cell. It converts nutrients into adenosine triphosphate, which powers cellular activity.'","exampleUseCases":null,"resultDescription":"Returns Flesch Reading Ease score (0–100 scale where higher = easier), Flesch–Kincaid grade level (US school grade equivalent), and raw counts for words, sentences, and syllables in the submitted text.","failureModes":["Empty or missing 'text' field returns a validation error","Non-English text may produce inaccurate scores since the algorithm is calibrated for English","Extremely short text (single word) may yield unreliable or edge-case scores","Payment failure (402) if USDC balance is insufficient"],"whenToPreferThis":"Use this endpoint when you need standardized Flesch readability metrics (Reading Ease + Kincaid grade level) for English prose, particularly for content quality checks, accessibility audits, or academic writing evaluation. Prefer this over general-purpose LLM readability assessments when you need reproducible, formula-based numeric scores.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:14:02.943Z","isFirstParty":false}