{"uid":"cap_XLJ2z-V8JUxL3kIElRdJ1","slug":"sift-web-tools-youtube-thumbnail-critique-scorer-36c1067a","name":"Sift Web Tools: YouTube Thumbnail Critique & Scorer","description":"Thumbnail critique: score 0-100, readability at feed size, text, contrast, clickbait risk, fixes. Looks at a thumbnail image URL (jpeg, png or webp, up to 4 MB) the way a viewer sees it at feed size and returns a 0-100 score, whether it reads when small, the exact text in it, contrast, focal point, face and emotion, clickbait risk, strengths and concrete fixes. Pass the video title to check title and thumbnail work together.","url":"https://sift.srv1996466.hstgr.cloud/v1/yt/thumbnail-check?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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"Thumbnail image URL"},"title":{"type":"string","description":"Optional video title"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"fixes":["Cut the text to 3 words"],"score":62,"verdict":"Clear focal point but too much text","contrast":"ok","clickbait_risk":"low","readable_at_small_size":false}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.015","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":"$0.015/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_DAUmb30DhwwwgP0H0Vdjn","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.015","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Analyzes a YouTube thumbnail image URL and returns a 0-100 quality score with readability, contrast, text, clickbait risk, focal point, face/emotion detection, and concrete fix suggestions.","exampleAgentPrompt":"Can you score my YouTube thumbnail at https://i.ytimg.com/vi/abc123/maxresdefault.jpg and tell me if it reads well in the feed, whether the text is too much, and what I should fix? The video title is '10 Budget Travel Hacks You Need to Know'.","exampleUseCases":[{"title":"Pre-publish thumbnail quality check","prompt":"Before I go live, can you analyze my thumbnail at https://i.ytimg.com/vi/xyz789/maxresdefault.jpg — give me a score, tell me if it's readable when small, flag any clickbait risk, and list the top fixes? The video is called 'How I Saved $10,000 in One Year'."},{"title":"Title and thumbnail alignment check","prompt":"I want to make sure my thumbnail and title work well together — check https://i.ytimg.com/vi/abc456/hqdefault.jpg with the title 'Why Every Developer Should Learn Rust in 2025' and tell me if the message is consistent, what the contrast is like, and whether there's too much text."},{"title":"Clickbait risk audit for brand safety","prompt":"Can you check this thumbnail for clickbait risk and tell me the score? Here's the URL: https://cdn.example.com/thumbnails/ep42.jpg — I also need to know what text is visible in it and whether the focal point is clear."}],"resultDescription":"Returns a JSON object with: a 0-100 quality score, a verdict string, a boolean for readability at small/feed size, the exact text detected in the image, a contrast rating (e.g. 'ok', 'poor', 'strong'), clickbait risk level (e.g. 'low', 'medium', 'high'), and an array of concrete fix suggestions.","failureModes":["Image URL unreachable or returns non-200 — endpoint cannot fetch or analyze the image","Image exceeds 4 MB size limit — may return an error or be rejected","Unsupported image format (not JPEG, PNG, or WebP) — analysis fails","Private or paywalled image URL — fetch blocked, no analysis returned","Malformed URL parameter — returns validation error"],"whenToPreferThis":"Use this endpoint when you need a structured, AI-powered critique of a YouTube thumbnail image specifically — covering visual readability at feed size, text density, contrast, clickbait risk, and actionable fixes in a single call. Prefer this over generic image-analysis APIs when you want thumbnail-specific scoring (0-100) and YouTube-context feedback, and especially when you want to optionally cross-check title/thumbnail coherence.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:34:59.448Z","isFirstParty":false,"canonicalSlug":"sift-web-tools-youtube-thumbnail-critique-scorer-36c1067a"}