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agentshelf.syntexa.ch Link rel=preload Extractor
x402
agentshelf.syntexa.ch Link rel=preload Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-09-29).
Extracts all link rel=preload href values from a given public web page URL or raw HTML, in an SSRF-safe manner.
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs link rel=preload hrefs extracted from a public page or HTML (SSRF-safe). Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/profile-rel-preload first.
Output
A list of href values found in link rel=preload tags on the target page or HTML — typically an array of URLs pointing to preloaded scripts, stylesheets, fonts, or other assets.
Example use cases
Audit page preload resources
“Pull all the link rel=preload hrefs from https://shop.acmecorp.com/home so I can see what assets the page is preloading ahead of time.”
Analyze HTML snippet preloads
“Here's some raw HTML from our new landing page — can you extract every rel=preload href from it so I know which resources will be hinted to the browser?”
Compare preload strategies across pages
“Fetch the preload links from https://staging.myapp.io/checkout and tell me which resources are being preloaded there.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/profile-rel-preload?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically extract link rel=preload resource hints from a public web page or a block of raw HTML. It is SSRF-safe, making it suitable for agent pipelines that cannot run untrusted fetches internally. Prefer the free sandbox endpoint (/v1/sandbox/profile-rel-preload) for testing; use this paid endpoint ($0.007 USDC) for production or when the sandbox is unavailable.
Side effects
- URL is not publicly accessible or requires authentication — returns error
- SSRF-blocked URL (private IP ranges, localhost) — rejected for safety
- HTML input exceeds 200,000 character limit — returns validation error
- No rel=preload links found on the page — returns empty list
- Malformed URL format — returns validation error
- Page fetch timeout or network error for URL-based requests
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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