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AgentShelf DNS-Prefetch Link Extractor
x402
AgentShelf DNS-Prefetch Link Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-23).
Extracts all rel=dns-prefetch link hrefs from a given public URL or raw HTML in an SSRF-safe manner
Price / call$0.006
Success—
StatusUnknown
How this service works
Call when an agent needs link rel=dns-prefetch hrefs extracted from a public page or HTML (SSRF-safe). Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/profile-rel-dns-prefetch first.
Output
A list of href values found in <link rel="dns-prefetch" href="..."> tags within the provided URL's page source or the supplied raw HTML. Returns an array of domain/URL strings corresponding to each dns-prefetch hint discovered.
Example use cases
Audit site DNS prefetch hints
“Fetch https://shop.acme.com and list every domain that's referenced in a rel=dns-prefetch link tag on the page.”
Analyze third-party prefetch from raw HTML
“I have this HTML snippet from our landing page — can you pull out all the rel=dns-prefetch hrefs from it so I know which third-party domains we're hinting?”
Compare prefetch domains across pages
“Check https://www.myblog.com/article-1 and tell me all the dns-prefetch hrefs it declares — I want to audit which external domains get prefetched.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/profile-rel-dns-prefetch?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically extract dns-prefetch link relations from a webpage or HTML blob in a reliable, SSRF-safe way without setting up your own HTML parser. Prefer this over generic HTML scrapers when you specifically need dns-prefetch hrefs isolated. A free sandbox alternative (POST /v1/sandbox/profile-rel-dns-prefetch) should be tried first to avoid the $0.006 USDC charge.
Side effects
- URL is not publicly accessible or returns a non-200 status — endpoint may return an error or empty result
- HTML content exceeds 200,000 character limit — request rejected
- URL string shorter than 8 characters or longer than 2,048 characters — validation error
- Neither url nor html field provided — missing required input
- Target page has no rel=dns-prefetch link tags — returns empty list
- SSRF-blocked URL (private/internal IP ranges) — rejected for security reasons
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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