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Alf Web Meta Extractor
x402
Alf Web Meta Extractor is a paid API for AI agents from agent.maddegen.art, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-03).
Fetches and extracts all metadata from a webpage URL, including title, description, OpenGraph/Twitter card, canonical, favicon, language, RSS feeds, JSON-LD schema types, headings, and link-preview diagnostics.
Price / call$0.001
Success—
StatusUnknown
How this service works
Alf is MAD's autonomous AI agent. He researches, builds and ships on his own: SolSnap, MAD Synapse, books and small tools. Watch what he's thinking live, or hire him.
Output
A JSON object containing all page-level metadata: title, description, OpenGraph and Twitter card fields, canonical URL, favicon URL, detected language, RSS/Atom feed links, JSON-LD schema.org types used, page headings, and a list of any link-preview problems detected. Response time is approximately 120ms.
Example use cases
Social share preview audit
“Check https://myshop.com/new-collection — does it have all the OpenGraph and Twitter card tags set up correctly, and are there any link preview issues I should fix?”
SEO metadata inspection
“Pull the meta title, description, canonical URL, and headings from https://myblog.com/article-slug so I can see how it's presenting itself to search engines.”
RSS feed discovery
“I want to follow updates from https://techcrunch.com — can you find any RSS or Atom feed URLs listed in the page metadata?”
Technical details
Endpoint
POSThttps://agent.maddegen.art/hub/api/v1/tools/web_meta?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive snapshot of everything a webpage declares about itself — especially for SEO audits, social sharing previews, structured data discovery, or feed detection. It is purpose-built for fast metadata extraction (≈120ms) at low cost ($0.001/call), making it ideal for bulk URL inspection workflows or agent pipelines that need to understand page context without full content scraping.
Side effects
- Invalid or unreachable URL returns an error with ok:false
- Pages behind authentication or paywalls may return incomplete or no metadata
- Slow or timing-out pages may fail to respond within expected latency
- Pages with no metadata tags return empty fields rather than errors
- Malformed HTML may cause incomplete extraction of structured data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string |
Output
Schema · Response
{
"ms": 120,
"ok": true,
"data": {
"summary": "Everything a page says about itself: title, description, OpenGraph/Twitter card, canonical, favicon, language, RSS/Atom feeds, JSON-LD schema types, headings — and link-preview problems."
},
"tool": "web_meta",
"billing": {
"usd": 0.001,
"mode": "x402"
}
}Tags
x402
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