Domain Authority Checker: Bulk Backlink & Link Rank Data

Check how well-linked any domain is, for thousands of domains at once, in seconds. For every domain you get an authority score from 0 to 100, the number of other domains that link to it, and its rank among 135 million domains on the web.

The data comes from the open Common Crawl web graph: a map of which websites link to which, built by the non-profit Common Crawl from billions of crawled pages. This Actor does not scrape Ahrefs, Semrush, Moz or any other SEO tool. It doesn't log in anywhere, and it doesn't break when those sites change.

• Fast and bulk: 100,000 domains finish in about two minutes.
• Cheap: $2 per 1,000 domains. Domains without data are free.
• Stable: no scraping, no captchas, no proxies, no API keys.
• Transparent: every number comes from a public dataset, and every row names the release it came from.

Who it's for

• Link builders and SEO agencies: sort an outreach list by authority before you send a single email.
• Domain investors: screen long lists of expiring or for-sale domains for real backlink strength.
• PR and affiliate teams: rank publications and partner sites by reach.
• Lead generation: add a "how big is this company online" signal to a list of company websites.
• Researchers: measure the link popularity of large sets of sites.

How to use it

1. Paste domains into Domains, one per line. stripe.com, https://www.stripe.com/pricing and sales@stripe.com all work.
2. Run it.
3. Sort the Scores view by authority, or export to CSV, Excel or JSON.

Example input

{
  "domains": ["apify.com", "wikipedia.org", "crawlee.dev"]
}

What you get

Field	Description
domain	The main domain that was checked (shop.example.co.uk is checked as example.co.uk)
authorityScore	0 to 100. How central the domain is in the web's link graph, on a log scale
referringDomains	How many different domains link to it
linkRank	Its position among all domains in the graph by harmonic centrality. 1 is the best-linked
topPercent	The same position as a percentage. 0.5 means the top 0.5% of the web
pageRankRank, pageRankScore	The domain's position and 0 to 100 score by PageRank, a second link measure
subdomainsSeen	How many different hosts of the domain the crawl found
found	Whether the domain is in the index
note	Why there is no data, when found is false
dataRelease	The web graph release the numbers come from

Example row

{
  "domain": "apify.com",
  "found": true,
  "authorityScore": 56,
  "referringDomains": 3929,
  "linkRank": 5020,
  "topPercent": 0.0037,
  "pageRankScore": 60,
  "subdomainsSeen": 30,
  "dataRelease": "cc-main-2026-aug-sep-oct"
}

Pricing

Item	Price
Domain scored	$0.002 ($2 per 1,000 domains)
Domain not in the index	Free
Invalid or repeated entry	Free

Set a spending limit on the run to cap your cost. The Actor stops cleanly when the limit is reached.

How the score works

Common Crawl publishes a domain-level web graph every few months: each domain is a node, and a link from any page of one domain to another domain is an edge. This release covers 135 million domains and 1.8 billion links between them.

The authority score combines three link measures, all on a log scale:

• 50%: referring domains. How many different domains link to this one.
• 30%: PageRank. Whether those links come from domains that are well linked themselves.
• 20%: harmonic centrality. How close the domain is to the rest of the web through links.

Some reference points from the current release: google.com 98, wikipedia.org 88, stripe.com 82, apify.com 56, a small business site with a few dozen referring domains around 20 to 30.

It is its own measure. It is not Moz Domain Authority or Ahrefs Domain Rating, and its numbers won't match theirs, but it answers the same question: how well-linked is this domain compared with the rest of the web?

Limitations

• Coverage: the index holds the 12.7 million domains that at least 10 other domains link to. Domains with fewer links, and new domains, are returned with found: false and a score of 0, free of charge.
• Freshness: the data is from the latest Common Crawl web graph release named in dataRelease. New releases come every few months, and the Actor is updated after each one.
• Domain level only: scores are per domain, not per page. All links count equally, including nofollow links.
• Crawl sample: Common Crawl doesn't visit every page on the web, so counts are lower than the real totals. They are useful for comparing domains with each other.

Run report

Each run saves a Run report with the number of domains checked, with and without data, and details of the web graph release used.

Removal requests

Site owners who want their domain left out can open an issue on this Actor's Issues tab.

Data source

Web graph data: Common Crawl, used under the Common Crawl Terms of Use. This Actor is not affiliated with Common Crawl, Moz, Ahrefs or Semrush.