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unprice Canonical URL Extractor
x402
unprice Canonical URL Extractor is a paid API for AI agents from volkov.evgeny.m2.fvds.ru, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).
Fetches a webpage and extracts its canonical URL and Open Graph URL metadata via a pay-per-request API using USDC on Base.
Price / call$0.001
Success—
StatusUnknown
How this service works
Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC receipts, and recent wallet statements.
Output
A JSON object containing the input URL, the resolved og:url (Open Graph URL), and the canonical URL as declared in the page's HTML link tag (e.g. {"url": "https://example.com", "ogUrl": "", "canonical": "https://example.com/"}).
Example use cases
SEO canonical URL audit
“I need to know the canonical URL for https://techcrunch.com/2024/01/15/some-article — can you fetch the page and tell me what its canonical tag and og:url resolve to?”
Deduplicating URLs in a content pipeline
“We have this URL https://blog.example.com/post?ref=twitter — can you look up its canonical URL so I can store the clean, preferred version?”
Checking canonical tag for a landing page
“Can you check what canonical URL is set on https://shop.mystore.com/products/widget-pro so I can verify our SEO tags are correct?”
Technical details
Endpoint
GEThttps://volkov.evgeny.m2.fvds.ru/pay/canonical?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to programmatically extract the canonical URL or og:url metadata from any publicly accessible webpage in a pay-per-use model without a subscription. It is ideal for one-off SEO checks, URL normalization in data pipelines, or deduplication tasks where you need the authoritative URL a page declares for itself.
Side effects
- URL not accessible or returns non-200 status — canonical and ogUrl fields may be empty or null
- Page has no canonical tag — canonical field returns empty string
- Payment fails or USDC balance insufficient — 402 response, request not processed
- Invalid or malformed URL input — request rejected with validation error
- Timeout fetching slow or unresponsive pages — empty or partial response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://example.com",
"ogUrl": "",
"canonical": "https://example.com/"
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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