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CSS Video Poster Extractor
x402
CSS Video Poster Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Extracts the CSS video[poster] attribute value from a public webpage or raw HTML (SSRF-safe)
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs video posters via video[poster] from a public page or HTML (SSRF-safe). Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/css-video-poster first.
Output
Returns the value of the poster attribute found in the HTML video element (a URL string pointing to the poster/thumbnail image), extracted from either a fetched public URL or provided raw HTML. If no poster attribute is found, returns null or an empty result.
Example use cases
Video thumbnail for social preview
“Grab the poster image URL from the video on this page https://news.example.com/video/story — I want to use it as a thumbnail in a social media preview card.”
Media metadata pipeline enrichment
“For each of these article URLs I'm processing, can you pull the video poster attribute so I can include the cover image in my metadata index?”
Video content audit tool
“I have the raw HTML of a page here — can you extract the video poster URL from it so I can check whether all our video embeds have proper poster images set?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/css-video-poster?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need the CSS video[poster] attribute value from a webpage or HTML blob and want an SSRF-safe, hosted extraction service rather than running your own scraper. It is cost-effective at $0.001 USDC per call. If you have the raw HTML already, pass it directly to avoid an extra fetch. Prefer the free sandbox endpoint POST /v1/sandbox/css-video-poster if available before using this paid version.
Side effects
- No video[poster] attribute present in the HTML — returns empty or null result
- Invalid or inaccessible URL — SSRF-blocked or non-public host returns an error
- HTML exceeds 200,000 character limit — request rejected
- URL shorter than 8 characters or longer than 2048 characters — validation error
- Target page requires authentication — content unavailable to the fetcher
- Malformed HTML prevents parsing — returns error or empty result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public page to fetch. The selector or profile is fixed by the SKU. Provide url or html. |
| html | string | HTML to extract from locally. Provide html or url. When both are set, html is used. |
Tags
x402
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