loc.gov

Ranked #138 of 300 on the Leaderboard. Analyzed .

Index Quotient

73.68

See it on the LeaderboardAnalyze again
91.19
Technical
75.32
Content
42.96
Answers
70.12
AI
88.81
Authority

Technical Health

91.19

Whether search engines can fetch, trust, and quickly load the site.

Strengths

  • CrawlabilityStrong

    Crawlers are welcome here: a sitemap points the way, links work, and pages are allowed into the index.

  • SpeedStrong

    Pages load quickly, and the server answers fast.

  • Secure connectionStrong

    Every visit is encrypted, and the headers that keep it that way are in place.

Opportunities

  • URL and canonical hygienePartial

    URLs are mostly in order; what remains is giving every page one settled address and making missing pages answer as missing.

Content Quality

75.32

Whether pages say clearly what they are about, in a form machines can read.

Strengths

  • Depth and readabilityStrong

    Pages say enough to be useful, in plain language, and stay on the topic their titles promise.

  • HeadingsStrong

    Each page has one main heading, with subheadings in a sensible order beneath it.

  • LanguageStrong

    The page language is declared and matches what is on the page.

Opportunities

  • Titles and descriptionsPartial

    Titles are mostly in place; descriptions and link previews are patchier, and each page wants ones of its own.

  • Images and linksPartial

    Pages link to one another, though some images lack a description and some link text says "read more" rather than where it leads.

Answer Readiness

42.96

Whether content is shaped and marked up so an engine can lift a direct answer.

Strengths

  • Navigation aidsStrong

    Interior pages show where they sit in the site, and say so in a way engines can read.

Opportunities

  • Structured dataMissing

    Pages carry no structured data, so nothing tells an engine what each one is; marking up the page type, and the site's name, is the first step here.

  • Question-and-answer shapePartial

    Some headings are questions with an answer beneath them; more of them, each followed by a short direct answer, is what an answer engine lifts.

  • Scannable formattingPartial

    Pages are partly scannable; opening with a short summary, and putting facts in lists and tables, makes them easier to lift from.

AI Visibility

70.12

Whether AI systems can reach, read, and confidently identify the site.

Strengths

  • AI accessStrong

    AI crawlers are allowed in, and pages may be quoted in AI answers.

Opportunities

  • IdentityPartial

    Who is behind the site is partly clear; an About page, a Contact page, and markup naming the organization would let machines say so with confidence.

  • Readable without JavaScriptPartial

    Most content is readable without running scripts, but some pages arrive thin, or the content is not clearly marked out from the furniture around it.

  • Authorship and sourcingWeak

    Articles rarely say who wrote them or when, and pages rarely link out to sources, which gives an AI little reason to trust them.

Authority

88.81

Whether the wider web vouches for the site.

Strengths

  • BacklinksStrong

    Plenty of other sites link here, including ones that matter.

  • TrafficStrong

    The site has a large audience.

  • Domain historyStrong

    The domain has a long history, and history counts.

Opportunities

Nothing here to work on. The points left are the ones only the web's largest sites earn.

Nearby on the Leaderboard

  1. #137medicare.gov73.87
  2. #138loc.gov73.68
  3. #139utexas.edu73.65

Scores reflect what IndexBot could read from loc.gov's available pages on .

IndexBot

IndexBot is the crawler behind SEO Leaderboard. It visits a website only when someone submits that domain, reads it the way a search engine would, and leaves.

What it does

  • Fetches the homepage, robots.txt, the sitemap, and up to 24 more pages, at most four at a time.
  • Reads raw HTML only. It runs no JavaScript and loads no images, fonts, or scripts.
  • Visits a domain at most once every 24 hours, however many people submit it.
  • Stores what it measured, never full copies of pages.

How it identifies itself

Mozilla/5.0 (compatible; IndexBot/1.0; +https://seoleaderboard.com/bot)

How to let it in

Bot protection often turns IndexBot away before it reads anything, and the domain then cannot be scored. If you run the site, allow the User-Agent IndexBot. In Cloudflare that is a WAF skip rule; most other tools have the same idea under a different name.

(http.user_agent contains "IndexBot")

IndexBot has no fixed IP range to allow instead, so the User-Agent is the only thing to match on. It never tries to disguise itself as a browser, and the limits above are the whole of what it asks for.

How to keep it out

IndexBot obeys robots.txt. Add this and it will not read your site, and your domain cannot be scored.

User-agent: IndexBot
Disallow: /

Questions

Write to bot@seoleaderboard.com.