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AgentShelf CSS-RSS Autodiscovery
x402
AgentShelf CSS-RSS Autodiscovery is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-29).
Extracts RSS feed hrefs from link[type='application/rss+xml'] elements in a public webpage or raw HTML string
Price / call$0.004
Success—
StatusUnknown
How this service works
Call when an agent needs RSS autodiscovery hrefs via link[type='application/rss+xml'] from a public page or HTML (SSRF-safe). Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/css-rss first.
Output
An array or list of href values found in link[type='application/rss+xml'] elements on the page or in the provided HTML, representing all RSS feed URLs autodiscovered from that source.
Example use cases
Blog RSS feed discovery
“What's the RSS feed link for https://www.theverge.com? Extract it from the page's autodiscovery tags so I can subscribe.”
Podcast site feed extraction
“I have the HTML of a podcast site — can you pull out any RSS feed hrefs from the link tags in this HTML: <html><head><link type='application/rss+xml' href='/feed.xml'/></head></html>”
News aggregator feed harvesting
“I'm building a news aggregator — can you extract all the RSS autodiscovery links from https://techcrunch.com so I know what feeds to subscribe to?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/css-rss?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically discover RSS feeds from a public webpage via the standard link[type='application/rss+xml'] autodiscovery mechanism, either by providing a URL to fetch or raw HTML to parse. It is SSRF-safe, making it suitable for agent pipelines that process user-supplied URLs. Prefer this over general-purpose scrapers when you specifically need RSS feed autodiscovery hrefs rather than full page content.
Side effects
- No RSS link tags found — returns empty array
- URL is unreachable or returns non-200 status — fetch error
- HTML input exceeds 200,000 character limit — validation error
- URL is blocked by SSRF safety rules — access denied
- Malformed HTML with no parseable head section — empty result
- URL shorter than 8 characters or longer than 2048 — validation error
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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