Broken Link Checker API - Bulk Link Checker & 404 Checker

Broken link checker, bulk link checker, 404 checker, link rot monitor, and static HTML website audit API. Fetch public source pages, extract unique a, link, img, and script targets, then check HTTP status, redirects, TLS, and response timing. Private/local targets are blocked. Point-in-time evidence only: no JavaScript, recursive crawl, authentication, continuous availability, or proof a transient response is permanently broken.