Crawlspur URL-Regel Inhaltstyp-Prüfung

Use this endpoint when you need to programmatically verify the actual MIME/content-type delivered by a specific URL as part of a technical SEO crawl audit, especially when checking whether URL rules are serving the expected content type (e.g., HTML vs. JSON vs. binary). It is part of the Crawlspur suite and is ideal for automated SEO auditing pipelines where per-URL content type inspection is needed alongside other crawl signals.

• URL is not publicly reachable — returns error indicating inaccessible target
• URL exceeds 2048 character limit — validation error on input
• CSS selector matches no elements — falls back to first match or returns empty selector result
• Invalid or non-HTTP(S) URL format — input validation failure
• Target server returns no Content-Type header — finding may be empty or undefined
• Rate limit or payment failure — x402 payment required error