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Page Metadata Extractor (Open Graph, Twitter Card, Canonical, Feeds, JSON-LD, Language)
x402
Page Metadata Extractor (Open Graph, Twitter Card, Canonical, Feeds, JSON-LD, Language) is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).
Extracts structured metadata from a public webpage including Open Graph tags, Twitter card data, canonical URL, RSS/Atom feeds, JSON-LD types, and language information.
Price / call$0.002
Success—
StatusUnknown
How this service works
Page metadata: Open Graph, Twitter card, canonical, feeds, JSON-LD types, language — Genesis402 / UnyKorn Operator Network
Output
A structured object containing extracted page metadata: Open Graph properties (og:title, og:description, og:image, etc.), Twitter card tags, canonical URL, discovered RSS/Atom feed URLs, JSON-LD schema types present on the page, and the declared or detected language of the page.
Example use cases
Social preview enrichment for link sharing
“Grab the Open Graph and Twitter card metadata from https://www.theverge.com/2024/1/15/my-article so I can see what title, description, and image would show up when someone shares it on social media.”
RSS feed discovery for a blog
“Check https://simonwillison.net and tell me if there are any RSS or Atom feeds available so I can subscribe to it.”
Structured data audit for SEO
“Fetch the page metadata for https://schema.org/Product and tell me what JSON-LD types are declared and what the canonical URL is — I'm auditing the structured data.”
Technical details
Endpoint
POSThttps://twin.unykorn.org/web/page-meta?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to quickly extract standardized web metadata (Open Graph, Twitter card, canonical, feeds, JSON-LD, language) from a single public URL without building your own HTML parser. It is well-suited for link-preview generation, SEO audits, feed discovery, and structured data inspection. Prefer it over general-purpose scraping endpoints when the specific goal is head-level metadata extraction rather than full page content.
Side effects
- URL is not publicly accessible (private, paywalled, or requires authentication) — returns error or empty metadata
- URL returns non-HTML content (PDF, image) — metadata fields may be absent
- Page uses JavaScript-rendered metadata that cannot be extracted from raw HTML — fields may be missing
- Invalid or malformed URL input — returns validation error
- Page blocks crawlers via robots.txt or rate limiting — may return empty or partial results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "page-meta",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.002,
"receipt_id": "g402-<16hex>"
},
"sources": [
{
"ok": true,
"name": "<source>"
}
],
"limitations": "<text>",
"generated_at": "<iso time>",
"evidence_hash": "sha256:<64hex>"
}
}Tags
x402
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