20 Services from papacasper.com

Crawls a website starting from a given URL and reports all broken links found on same-origin pages, with optional external link checking.

Checks the SSL/TLS certificate for a given hostname, returning certificate validity, expiry, and related details

Audits a given URL's HTTP security headers and returns a structured report of their presence, configuration, and any issues found.

Extracts structured data from a webpage using CSS selectors, returning matched text content or HTML attributes for each named field

Validates the JSON-LD structured data markup on a given URL and reports errors, warnings, and schema compliance issues

Analyzes a given URL and identifies the underlying technologies, frameworks, and services powering that website.

Validates the sitemap.xml for a given URL, checking its structure, accessibility, and compliance

Checks email deliverability configuration for a domain by auditing DNS records like SPF, DKIM, DMARC, and MX

Checks DNS propagation for a given domain and record type across resolvers, returning current DNS record values

Scans a hostname or IP address for open TCP ports and returns which ports are reachable

Traces the full HTTP redirect chain from a starting URL, returning each hop, status code, and final destination.

Resolves a hostname or IPv4 address to its geographic location and Autonomous System Number (ASN) details

Fetches a web page by URL and returns its content converted to Markdown format

Checks a website's favicon presence and web app manifest configuration by deriving the site origin from any provided URL

Fetches and analyzes the robots.txt and sitemap files for any given website URL, returning their contents and status.

Performs an SEO audit on a given URL and returns structured analysis of SEO health and issues

Checks the health of a given domain, including robots.txt, sitemap, and SEO-related signals.

Probes a given URL and returns its CORS (Cross-Origin Resource Sharing) policy configuration and headers

Tests whether a given WebSocket URL is reachable and responsive

Measures and audits the performance of a given webpage URL, returning performance metrics and diagnostics.