{"uid":"cap_pKPygWmQIXEqslpYjnigS","slug":"agentstoolshub-readability-metrics-e6984505","name":"AgentsToolsHub Readability Metrics","description":"Compute readability metrics for a block of text: Flesch Reading Ease score, Flesch-Kincaid grade level, and word/sentence/syllable statistics. Deterministic formulas — useful for checking documentation, prompts and agent output clarity. Use this when an agent needs to flesch reading-ease and grade level for any text.","url":"https://agentstoolshub.com/api/v1/dev/readability?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["text"],"properties":{"text":{"type":"string","description":"Text"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZotODb1qROhKiWwC1H97m","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes Flesch Reading Ease score, Flesch-Kincaid grade level, and word/sentence/syllable statistics for any block of text","exampleAgentPrompt":"Can you check the readability of this paragraph and tell me the Flesch Reading Ease score, Flesch-Kincaid grade level, and word and sentence counts: 'Effective communication requires clarity. Short sentences help readers follow along. Avoid jargon where possible.'","exampleUseCases":[{"title":"Documentation clarity check","prompt":"Can you run a readability check on this API documentation paragraph and tell me the Flesch Reading Ease score and grade level? I want to make sure it's accessible to developers who aren't native English speakers: 'Authentication tokens must be included in the Authorization header of each HTTP request using the Bearer scheme.'"},{"title":"Agent prompt complexity audit","prompt":"Score the readability of this system prompt I wrote for my AI agent — give me the Flesch Reading Ease and Flesch-Kincaid grade level so I know if it's too complex: 'You are an intelligent assistant responsible for orchestrating multi-step workflows by decomposing user intents into discrete, executable subtasks and delegating them to specialized downstream agents.'"},{"title":"Student writing grade-level check","prompt":"What's the Flesch-Kincaid grade level and reading ease score for this student essay intro? I need to know if it's writing at the right level for a 10th grader: 'The industrial revolution fundamentally transformed economic structures across Europe, displacing agrarian labor through mechanized production and catalyzing unprecedented urbanization.'"}],"resultDescription":"Returns a JSON object with the Flesch Reading Ease score (0–100 scale, higher = easier), Flesch-Kincaid grade level (US school grade equivalent), total word count, total sentence count, and total syllable count for the submitted text.","failureModes":["Missing 'text' query parameter returns an error","Empty string input may return zero or undefined scores","Extremely short text (1–2 words) may yield unreliable or edge-case scores","Non-English text may produce inaccurate syllable counts since formulas are English-calibrated","Very long text strings may hit URL length limits for GET requests"],"whenToPreferThis":"Choose this endpoint when you need fast, deterministic readability metrics based on standard Flesch/Flesch-Kincaid formulas — ideal for checking documentation, agent prompts, educational content, or any text where clarity matters. Unlike LLM-based writing quality assessments, results are fully reproducible and formula-driven with no hallucination risk. Best when you need a numeric score rather than qualitative feedback.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T19:05:57.749Z","isFirstParty":false,"canonicalSlug":"agentstoolshub-readability-metrics-e6984505"}