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Research · July 13, 2026

NRDAX: browsable by chain and family, readable by machines

Simon Morley·2 min read

NRDAX now contains 623 techniques across 64 chains. 162 are reproduced with bundles.

Discovery and navigation

  • Per-chain landing pages at /chains/<chain>: one per chain with a reproduced technique (24), listing its techniques by human name, under a /chains hub index.
  • Per-family landing pages at /families/<family>: one per populated family (20), with readable labels and an axis blurb.
  • A three-column footer (Registry, Chains, Project) with per-chain nav on every page.
  • Browse by chain or by family from the homepage. Matrix chain headers and technique-page chains now link through to their own pages.

Machine-readability

  • Pretty Atom feed: /feed.xml renders as a readable page in the browser (XSL stylesheet) instead of downloading.
  • A machines strip up top: JSON API, STIX 2.1, knowledge pack, Atom feed. For machines, surfaced first.
  • Dataset distribution links in the homepage JSON-LD (DataDownload for JSON, STIX, knowledge pack, and feed) so crawlers and answer engines know where to fetch the data.

Crawlability and data quality

  • The sitemap now lists every new chain and family landing page.
  • Fixed the first_seen date bug: CVE-only year parsing, so version and PR numbers are no longer read as years, plus a one-time migration that scrubbed the 2030 and 1972 garbage dates from the feed and sitemap.

Explore at nrdax.com. Browse by chain, by family, or pull the data by machine. The gaps are visible in the coverage matrix.

nrdaxsecurity-researchtaxonomyregistrystixvalidator-security
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