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Crawlspur Canonical Self-Reference Check for Parameter URLs
x402
Crawlspur Canonical Self-Reference Check for Parameter URLs 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 parameter-based URL has a self-referencing canonical tag pointing to itself.
Price / call$0.001
Success—
StatusUnknown
How this service works
Prüft am Objekt parameter-url den Befund selbstreferenzierende kanonische Adresse.
Output
Returns a structured finding indicating whether the target parameter URL contains a self-referencing canonical tag (i.e. whether the rel=canonical attribute on the page points to the URL itself), along with the actual canonical value found and any diagnostic details about the canonical declaration.
Example use cases
E-commerce filter URL canonical audit
“I want to make sure our filtered product page at https://shop.example.com/shoes?size=42&color=black has a canonical tag that points to itself — can you check if the self-referencing canonical is set correctly?”
CMS parameter page SEO check
“Our CMS generates URLs like https://blog.example.com/articles?page=2&tag=seo — can you verify whether that URL has a proper self-referencing rel=canonical tag?”
Tracking parameter canonicalization check
“We append UTM parameters to our landing page so it becomes https://example.com/landing?utm_source=newsletter — please check if the canonical tag on that URL correctly self-references rather than stripping the parameters.”
Technical details
Endpoint
POSThttps://crawlspur.halowerk.com/v1/pruef/crawlspur/canonical-selbst/parameter-urlWhen to prefer
Use this endpoint specifically when you need to verify that a URL containing query parameters (filters, tracking parameters, pagination, sorting) has a rel=canonical tag that self-references — i.e. points back to the exact same URL. This is distinct from checking whether a URL is blocked by robots.txt, whether it appears in a sitemap, or whether a canonical points to a different consolidation URL. Choose this over generic HTTP inspection tools when you need a structured SEO-focused canonical self-reference verdict.
Side effects
- URL is not publicly reachable (network error or 4xx/5xx response)
- URL exceeds maximum length of 2048 characters
- CSS selector matches no element or multiple ambiguous elements
- Target page has no canonical tag at all
- Redirect chain prevents reaching the original parameter URL
- Malformed or relative canonical href that cannot be resolved
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| ziel | — |
Tags
x402
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