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agentshelf.syntexa.ch XPath AMP HTML Link Extractor
x402
agentshelf.syntexa.ch XPath AMP HTML Link Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Extracts the href value of the AMP HTML link element (link[rel='amphtml']) from a public web page URL or raw HTML string
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs href of link rel=amphtml via //link[@rel='amphtml']/@href from a public page or HTML (SSRF-safe). Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/xpath-amphtml first.
Output
Returns the string value of the href attribute from the first matching link[rel='amphtml'] element found in the fetched page or provided HTML, typically an absolute URL pointing to the AMP version of the page.
Example use cases
AMP URL discovery for news article
“I have this news article URL — https://www.bbc.com/news/technology-12345678 — can you find its AMP version link? I need the href from the link rel='amphtml' element.”
Validate AMP link in raw HTML
“Here's the raw HTML of a blog post page — can you pull out the href from the amphtml link tag so I can verify it has a proper AMP version?”
Crawl pipeline AMP link extraction
“For each article URL in my list, starting with https://www.theguardian.com/world/2024/news-story, extract the amphtml link href so I can build a map of canonical-to-AMP URLs.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/xpath-amphtml?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically discover the AMP (Accelerated Mobile Pages) version URL of a web page, either by providing a public URL to fetch or raw HTML you already have. It is SSRF-safe (blocks private and metadata addresses), making it suitable for agent pipelines that accept user-supplied URLs. Prefer this over building a custom XPath parser when you need a reliable, pay-per-call extraction of a well-known link relation.
Side effects
- No amphtml link found — page has no AMP version, returns null or empty result
- URL fetch blocked or times out — SSRF-safe filter rejects private/metadata IP ranges
- HTML input too large — exceeds 200,000 character limit
- Malformed URL — shorter than 8 characters or invalid format
- Network error fetching the provided URL — returns error status
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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