Analyzes backlink profiles with a smart tiering system that works even if you don't have premium APIs. The free tier uses Common Crawl for domain graphs and includes a verification crawler to check if links still exist. Add free Moz and Bing Webmaster API keys for anchor text distribution and referring domain quality. Spring for DataForSEO if you need link velocity tracking or new/lost backlink detection. The toxic link detection is thorough, checking 30 patterns against known PBN indicators and unnatural anchor distributions. What's smart is the confidence weighting when mixing sources, so you know when you're working with solid data versus rough estimates. The competitor gap analysis works with any tier.
npx skills add https://github.com/agricidaniel/claude-seo --skill seo-backlinks