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What do open-source SEO crawlers check?

Open-source SEO crawler notes on the site come from public observation and read as a coverage map, not as a scoreboard.

Educational material only. Mika does not guarantee search rankings or AI answer citations.

Definition

Open-source SEO crawler notes on the site, based on public observation of puneetindersingh/open-seo-crawler under the MIT license, mention titles, sitemaps, hreflang, duplicates, broken links, noindex via meta robots or X-Robots-Tag, status codes, canonicals, and soft 404s. That list is a coverage map, not a scoreboard, and it does not mean the project documentation was copied.

Short answer

The notes mention titles, sitemaps, hreflang, duplicates, broken links, noindex via meta robots or X-Robots-Tag, status codes, canonicals, and soft 404s. They are a coverage map from public observation of that MIT-licensed crawler, not a scoreboard and not a copy of its documentation.

What to check

  • Titles and sitemaps
  • Hreflang and canonicals
  • Broken links and duplicates
  • Noindex and soft 404s

What this does not claim

A crawler coverage map does not guarantee healthier rankings or that every issue will be found. Mika does not guarantee search rankings or AI answer citations, and these notes do not claim the open-source documentation was copied.

A practical example

A note can record that one URL has a title, appears in a sitemap, and sends hreflang, while another is marked noindex through meta robots or X-Robots-Tag. The same coverage map can include duplicates, broken links, status codes, canonicals, and soft 404s without turning the crawl into a scoreboard.

FAQ

What is the short answer?

The notes mention titles, sitemaps, hreflang, duplicates, broken links, noindex via meta robots or X-Robots-Tag, status codes, canonicals, and soft 404s. They are a coverage map from public observation of that MIT-licensed crawler, not a scoreboard and not a copy of its documentation.

What does this page not claim?

A crawler coverage map does not guarantee healthier rankings or that every issue will be found. Mika does not guarantee search rankings or AI answer citations, and these notes do not claim the open-source documentation was copied.

Next step

Run a structured SEO + GEO audit to see health findings, growth gaps, and a blueprint you can act on.

Start on Mika

Clearer entities, answers, evidence, and context make pages easier to understand and reference. Results in any answer product are not guaranteed.