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AgentShelf Syntexa - Extract link[rel=preconnect] hrefs from page or HTML
x402
AgentShelf Syntexa - Extract link[rel=preconnect] hrefs from page or HTML is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Extracts all href values from link[rel=preconnect] elements in a public webpage or raw HTML string, returning them as a list.
Price / call$0.005
Success—
StatusUnknown
How this service works
Call when an agent needs link rel=preconnect hrefs extracted from a public page or HTML (SSRF-safe). Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/profile-rel-preconnect first.
Output
A list of href values from all link[rel=preconnect] elements found in the provided URL or HTML input, enabling the caller to identify which external origins the page establishes early TCP/TLS connections with.
Example use cases
Audit third-party connection origins
“I want to see every domain that example.com preconnects to — can you extract all the link rel=preconnect hrefs from that page for me?”
Analyze preconnect hints from raw HTML
“I have this HTML snippet from our site — can you parse it and give me all the link rel=preconnect href values it contains?”
Performance dependency mapping
“Can you fetch https://shop.mybrand.com and list all the preconnect link hrefs so I can audit which CDNs and APIs we're loading?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/profile-rel-preconnect?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to extract link[rel=preconnect] href values from a live URL or raw HTML, and your agent is operating in a paid context (x402). Prefer the free sandbox endpoint POST /v1/sandbox/profile-rel-preconnect when available. Ideal for auditing third-party dependencies, performance diagnostics, or building resource-hint maps of websites.
Side effects
- URL is not publicly accessible or returns non-200 status
- HTML exceeds 200,000 character limit
- URL shorter than 8 characters or longer than 2048 characters
- No link[rel=preconnect] elements found (empty result)
- SSRF attempt blocked by safety filter
- Payment of $0.005 USDC not completed or rejected
- Malformed HTML that cannot be parsed
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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