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Sift Web Tools: YouTube Thumbnail Critique & Scorer
x402
Sift Web Tools: YouTube Thumbnail Critique & Scorer is a paid API for AI agents from sift.srv1996466.hstgr.cloud, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-20).
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.
Price / call$0.015
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Pre-publish thumbnail quality check
“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 and thumbnail alignment check
“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.”
Clickbait risk audit for brand safety
“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.”
Technical details
Endpoint
GEThttps://sift.srv1996466.hstgr.cloud/v1/yt/thumbnail-check?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"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
}
}Tags
x402
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