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Domain report

libraries.io

libraries.io ranks in the top 0.29% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 4 distinct hosts observed under it.

Explore libraries.io in the Web Graph

Connectivity

#391,262harmonic-centrality rank
Top percentile
0.29%
Hosts observed
4

From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means

HTTPS reachability

200HTTP status

https://libraries.io/ answered with HTTP 200.

DNS records

A
  • 35.244.128.241
AAAA
No records found.
MX
  • 5 alt1.aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
  • 1 aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
NS
  • ns-cloud-b1.googledomains.com.
  • ns-cloud-b3.googledomains.com.
  • ns-cloud-b2.googledomains.com.
  • ns-cloud-b4.googledomains.com.

Live preview

Screenshot of libraries.io

This site sends "X-Frame-Options: SAMEORIGIN", which blocks embedding it here.

Since libraries.io can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.

Domain registration (WHOIS / RDAP)

RDAP lookup failed (HTTP 429).

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=utf-8
Cache-Control
max-age=0, private, must-revalidate
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
max-age=63072000; includeSubDomains
X-Frame-Options
SAMEORIGIN
X-Content-Type-Options
nosniff
Referrer-Policy
strict-origin-when-cross-origin
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://libraries.io/HTTP 301

    → https://libraries.io/

  2. 2.https://libraries.io/HTTP 200

Meta tags

Title
Libraries.io - security & maintenance data for open source software
Description
Discover open source packages, modules and frameworks you can use in your code.
Canonical
Not set
Robots
Not set
Generator
Not set
Open Graph title
Libraries.io - security & maintenance data for open source software
Open Graph description
Discover open source libraries, modules and frameworks you can use in your code
Open Graph image
https://libraries.io/apple-touch-icon-152x152.png
Open Graph type
article
Twitter card
summary
Twitter title
Libraries.io - security & maintenance data for open source software
Twitter image
https://libraries.io/apple-touch-icon-152x152.png

robots.txt

Disallow rules (User-agent: *)
16
Disallow rules (other agents)
0

Sitemap declared:

  • https://libraries.io/sitemaps/sitemap.xml.gz

Technology detected

Best-effort, based on a small set of well-known signals — this may be incomplete.

  • Cloudflarecdn

    Server: cloudflare

  • Google Analyticsanalytics

    Found "www.google-analytics.com" in the page's HTML

  • Google Tag Manageranalytics

    Found "googletagmanager.com/gtm.js" in the page's HTML

Related domains

Similar connectivity

Domains ranked just above and below it in the same snapshot.