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AgentShelf CSS H1 Extractor
x402
AgentShelf CSS H1 Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).
Extracts the text content of the first H1 element from a public URL or raw HTML, with SSRF protection.
Price / call$0.01
Success—
StatusUnknown
How this service works
Call when an agent needs h1 text via h1 from a public page or HTML (SSRF-safe). Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/css-h1 first.
Output
Returns the text content of the first H1 element found in the provided URL's page or the supplied HTML string. If no H1 is present, the response likely returns an empty or null value. The extraction is SSRF-safe, meaning server-side request forgery protections are applied when fetching URLs.
Example use cases
Verify landing page headline
“Can you check what the H1 heading says on https://mycompany.com/landing — I want to make sure the headline is still showing correctly after the deploy.”
Extract article title from URL
“Pull the H1 text from https://techcrunch.com/2024/01/15/some-article so I can log it without opening the browser.”
Parse H1 from raw HTML snippet
“I have this HTML chunk — can you extract the H1 text from it? It starts with <html><body><h1>Welcome to the platform</h1>...”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/css-h1?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to reliably extract only the H1 heading text from a public webpage or a known HTML blob, with built-in SSRF safety for server-side URL fetching. Prefer the free sandbox endpoint POST /v1/sandbox/css-h1 for testing or unpaid use cases. Choose this paid endpoint for production pipelines where SSRF protection and reliability matter. It is more focused than general HTML scraping services — ideal when all you need is the H1, not full-page content.
Side effects
- URL is unreachable or returns a non-200 status — extraction fails
- No H1 element present in the HTML — returns empty or null result
- HTML exceeds 200,000 character limit — request rejected
- URL string shorter than 8 characters or longer than 2,048 characters — validation error
- SSRF protection blocks private/internal IP ranges — request rejected
- Malformed HTML may cause unexpected parsing 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
Reviews
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