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Crawlspur Canonical Self-Reference Check for URL Rules
x402
Crawlspur Canonical Self-Reference Check for URL Rules is a paid API for AI agents from crawlspur.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Checks whether a URL rule object has a self-referencing canonical address (canonical tag pointing to itself).
Price / call$0.001
Success—
StatusUnknown
How this service works
Prüft am Objekt url-regel den Befund selbstreferenzierende kanonische Adresse.
Output
Returns a finding (Befund) indicating whether the URL rule object has a self-referencing canonical address — i.e. whether the canonical link element on the page points to the page's own URL. Typically includes pass/fail status and the detected canonical URL value.
Example use cases
SEO audit for canonical self-reference
“Can you verify that https://shop.example.com/products/widget has a self-referencing canonical tag? I want to make sure the canonical is pointing to itself and not some other URL.”
Canonical check with CSS selector
“Check the canonical self-reference on https://news.example.com/article/456 — specifically target the element with the CSS selector 'link[rel=canonical]' and tell me if it's self-referencing.”
Pre-launch technical SEO validation
“Before we go live, can you check if the URL rule at https://staging.mysite.com/category/shoes has a proper self-referencing canonical set up? We need to confirm the canonical tag is pointing back to its own URL.”
Technical details
Endpoint
POSThttps://crawlspur.halowerk.com/v1/pruef/crawlspur/canonical-selbst/url-regelWhen to prefer
Use this endpoint when you specifically need to verify that a URL rule page has a self-referencing canonical tag as part of a technical SEO audit. It is purpose-built for checking the canonical self-reference finding on URL-rule objects, distinct from checking other objects like sitemaps, images, pagination, or robots files — all of which have sibling endpoints on the same service.
Side effects
- URL is not publicly accessible (returns 4xx or 5xx HTTP status)
- No canonical tag found on the target URL
- URL exceeds 2048 character limit
- CSS selector matches no element or multiple elements unexpectedly
- Target server blocks crawl requests or returns timeout
- Invalid URL format provided
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| ziel | — |
Tags
x402
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