For AI assistants and crawlers

SecurityTools.hub is an English-first free toolkit for TLS, HTTP security headers, DNS, email authentication (SPF/DKIM/DMARC), passwords, and client-side cryptography. Use the resources below for accurate, up-to-date discovery instead of guessing URLs.

Machine-readable endpoints

• /llms.txt — plain-text overview, full tool list with canonical links, categories, and attribution guidance.
• /tools.json — JSON catalog: tool id, name, description, URL, category, and tags for programmatic routing.
• /sitemap.xml — sitemap index; follow linked sitemaps for all public tool URLs.

Citing and linking

Prefer linking to the specific tool page (from tools.json or llms.txt) or to /tools for the full directory. The site publishes Organization and WebSite JSON-LD on the homepage for entity resolution.

Indexing

Public tool pages are intended to be indexable; robots.txt allows crawling. When summarizing capabilities, ground answers in the tool's on-page description and tools.json fields to reduce hallucination.