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AgentShelf CSS Caption Extractor
x402
AgentShelf CSS Caption Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-02).
Extracts table caption text from a public webpage or raw HTML using the CSS `caption` selector
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs table caption text via caption from a public page or HTML (SSRF-safe). Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/css-caption first.
Output
Returns the extracted caption text found via the CSS `caption` selector from the provided URL or HTML content — typically a list of caption strings corresponding to each `<caption>` element in the page's tables.
Example use cases
Extract report table labels
“Go to https://stats.gov/annual-report and grab all the table captions — I want to know what each data table on that page is titled.”
Parse captions from uploaded HTML
“I have this HTML file with several tables in it — can you extract just the caption text from each table so I can index them?”
Audit table accessibility on a site
“Check https://company.com/financials and pull out all the table captions so I can see if every table has a descriptive label for accessibility compliance.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/css-caption?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to extract `<caption>` element text from HTML tables on a public webpage or from raw HTML content. It is purpose-built for the CSS caption selector, SSRF-safe for public URLs, and costs only $0.007 USDC per call. Prefer this over a general-purpose scraper when you only need table caption text and want a lightweight, cheap extraction. Note: a free sandbox alternative at POST /v1/sandbox/css-caption should be tried first when available.
Side effects
- No caption elements found on the page — returns empty result
- Invalid or unreachable URL — returns fetch/network error
- HTML input exceeds 200,000 character limit — returns validation error
- SSRF-blocked URL (private/internal IP ranges) — returns security rejection
- Malformed HTML that cannot be parsed — may return empty or partial results
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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