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AgentShelf CSS Header Extractor
x402
AgentShelf CSS Header 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 the primary header text (H1/H2 CSS header) from a public URL or raw HTML string, with SSRF protection.
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs header text via header from a public page or HTML (SSRF-safe). Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/css-header first.
Output
Returns the extracted header/heading text found in the page or HTML, typically the H1 or primary CSS-styled header element. The response is a text string representing the most prominent heading on the page.
Example use cases
Competitor page header monitoring
“What is the main header on https://competitor.com/pricing right now? I want to know what headline they're leading with.”
Verify article headline from raw HTML
“I have this big chunk of HTML from an article — can you pull out just the main header text from it so I know what the piece is called?”
Audit landing page headings
“Can you fetch the primary heading from https://mybrand.com/landing-spring-sale so I can check whether our campaign headline is live?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/css-header?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to quickly extract just the primary header/heading text from a webpage or HTML blob, without needing full page content or metadata. Prefer this over general scrapers when header-only extraction is sufficient and cost efficiency matters. Use the unpaid sandbox POST /v1/sandbox/css-header first to test; fall back to this paid endpoint ($0.007 USDC) for production use or when the sandbox is unavailable.
Side effects
- URL is unreachable or returns non-200 status — extraction fails with an error
- Provided HTML has no detectable header element — returns empty or null result
- URL points to a private/internal address blocked by SSRF protection — request rejected
- HTML content exceeds 200,000 character limit — input rejected
- URL shorter than 8 characters or longer than 2048 characters — validation error
- Page requires JavaScript rendering to display header — static extraction may return empty
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
Reviews
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