Domain Authority Checker - Backlinks & Traffic Rank, Bulk

What does Domain Authority Checker do?

Paste a list of domains, get an authority score (0-100), referring domains and a traffic rank for each one, at $3 per 1,000 domains with data. Domains that nothing links to, duplicates and invalid lines are free.

Give it a list of domains (or URLs, or e-mail addresses). For each one it returns, in bulk:

• an authority score from 0 to 100,
• referring domains: how many other websites link to it,
• its web graph rank (harmonic centrality) and PageRank position among 133 million domains,
• Majestic Million rank, referring subnets and referring IPs (for the top 1 million sites),
• a traffic rank from Chrome's real-user data: "Top 1K / 5K / 10K / 50K / 100K / 500K / 1M websites",
• the number of subdomains seen.

It works for any domain on the web, not just big sites: the current data covers 120 million domains that at least one other domain links to.

Open data, no scraping of SEO tools. The numbers come from public datasets, not from logging in to Ahrefs, Moz, Semrush or Similarweb:

Data	Source	Licence
Web graph rank, PageRank, referring domains, subdomains	Common Crawl web graph, domain level, July-September 2026 (2.1 billion links between 133 million domains)	Common Crawl Terms of Use
Majestic rank, referring subnets and IPs	Majestic Million	CC BY 3.0
Traffic rank buckets	Chrome UX Report top origins (crux-top-lists)	public CrUX data

The data is refreshed when Common Crawl publishes a new quarterly web graph; every row says which release it came from (dataRelease).

Real results (3 October 2026)

Domain	Authority	Referring domains	Web graph rank	Traffic rank (Chrome)
google.com	98	15,604,344	3	Top 1K
wikipedia.org	91	2,198,837	14	Top 1K
bbc.co.uk	81	249,224	90	Top 1K
zapier.com	72	48,072	586	Top 50K
apify.com	60	3,556	5,287	Top 100K
scrapingbee.com	46	956	436,782	Top 1M
a local plumber's site	16	4	31,773,792	-

Use cases

• Link building and outreach: score a list of prospect sites and keep the ones worth contacting.
• Lead scoring: rank a list of company websites (from Google Maps, a CRM or a trade-show list) by web presence.
• Expired and for-sale domains: check how many sites still link to a domain before you buy it.
• Competitor and market maps: compare the authority and popularity of every site in a niche.
• Data enrichment: run it on the website field of another Actor's dataset (Dataset ID input).

How much does it cost?

Event	Price	When
Domain checked	$3.00 / 1,000 domains	a domain returned with its authority data

Free: domains that no other domain links to in the web graph (authority 0, found: false), duplicates (checked once) and invalid lines. No start fee. Larger Apify plans get the usual volume discount (Silver 10%, Gold and above 20%).

Example: 10,000 prospect domains = $30 at most, typically less because unknown domains are free. Speed: well-known domains are answered in seconds; 500 domains that mostly are not in the data take about two minutes.

For comparison (Apify Store, checked 3 October 2026): Actors that read these metrics from Ahrefs, Semrush or Moz charge $0.01-$0.015 per domain or row (the most used one, 1,048 users in 30 days, charges $0.015); Similarweb traffic Actors charge $0.002-$0.013 per site. Those return the commercial tools' own metrics (Ahrefs DR, Moz DA, estimated visits), which this Actor does not have.

Control your cost

• Before it starts, the run logs its worst-case cost (domains x price) and compares it with your maximum charge per run. The run never goes past the maximum: it checks as many domains as still fit (counting every domain as if it had data), then stops. SUMMARY.status is LIMIT_REACHED and SUMMARY.notProcessed lists the domains that were not checked, so the actual charge can be a little below the maximum.
• Every row has charged: true or false; failed rows have an error that ends with "(not charged)".

How to use it

1. Paste domains, URLs or e-mail addresses into Domains, one per line, or pick a Dataset ID (and Dataset field) from another run.
2. Click Start. The Domains (overview) tab shows authority, referring domains and ranks; Domains (all fields) has everything.

Subdomains are checked as their registrable domain: blog.example.co.uk becomes example.co.uk, someone.github.io becomes github.io (the web graph counts links per registrable domain). The original line stays in input.

Input example

This is the input the form is prefilled with; a run with it takes a few seconds and costs only cents:

{
    "domains": [
        "apify.com",
        "wikipedia.org",
        "tools.yukai.uk",
        "github.com",
        "bbc.co.uk"
    ]
}

Output example

Real result (3 October 2026):

{
    "input": "apify.com",
    "inputs": ["apify.com", "https://apify.com/store"],
    "domain": "apify.com",
    "found": true,
    "authorityScore": 60,
    "authorityPercentile": 99.99,
    "referringDomains": 3556,
    "webGraphRank": 5287,
    "pageRankPosition": 19402,
    "subdomains": 29,
    "majesticRank": 16288,
    "majesticReferringSubnets": 2586,
    "majesticReferringIPs": 5911,
    "chromeTrafficBucket": 100000,
    "trafficRank": "Top 100K websites (Chrome)",
    "dataRelease": "cc-main-2026-jul-aug-sep",
    "charged": true
}

How the authority score is calculated

The score is the average of two parts, each from 0 to 100:

• rank part: 100 x (1 - log10(webGraphRank) / log10(133,241,980))^0.6, where the web graph rank is the domain's harmonic centrality position (how close it is to every other domain through links);
• link part: 100 x log10(1 + referringDomains) / 7, so 10 million referring domains = 100.

It is our own transparent metric, not Moz Domain Authority or Ahrefs Domain Rating, and it will not match them exactly. It is consistent across all 120 million domains, so it is good for ranking and filtering lists.

Use it from code

curl -X POST "https://api.apify.com/v2/acts/tidytools~domain-authority/run-sync-get-dataset-items?token=YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"domains":["apify.com","zapier.com","example.org"]}'

With AI agents (MCP): connect Apify's MCP server (https://mcp.apify.com?tools=tidytools/domain-authority) to Claude, Cursor or any MCP client and ask, for example, "Which of these 50 sites has the most referring domains?". Minimal input: {"domains": ["apify.com"]}. Domains without data are not charged and say so in note; invalid lines carry an errorType.

Limitations

• Referring domains come from Common Crawl's crawl, which sees a large share of the public web but not all of it. Counts are lower than Ahrefs' or Semrush's (which crawl more), and the same for every domain, so comparisons between domains are fair.
• The data is a quarterly snapshot (currently July-September 2026), not live. A link added last week is not in it yet.
• No list of individual backlinks (which pages link, anchor text): this Actor returns counts and ranks per domain.
• Majestic data exists only for the top 1 million domains and Chrome traffic buckets for the top 1 million origins; other domains show null there.
• The traffic rank is a popularity bucket, not a number of visits.

FAQ

Does the Actor collect usage data? The Actor sends one anonymous usage counter per run (input type, item count range, outcome) to improve the tool; no URLs, content or account data.

What if I paste something that is not a domain, or nothing at all? Each bad line (including a domain ending that does not exist, such as example.c) becomes a row with errorType: "invalid_input" and charged: false; if no line is usable the run still finishes normally (no failed run) with that error row and a status message, and costs nothing. A wrong Dataset ID or field gives the same kind of row.

Does a URL, e-mail address or subdomain work? Yes. https://www.nytimes.com/section/world, info@hubspot.com and blog.example.co.uk are all reduced to their registrable domain (nytimes.com, hubspot.com, example.co.uk) and checked once; the original text stays in input. Upper case, a trailing dot, a port and pasted quotes, brackets or a trailing ; are ignored, and internationalised names such as bücher.de are looked up in punycode (xn--bcher-kva.de; domain shows the punycode form). Names with a label over 63 characters or a label starting or ending with a hyphen are invalid lines. A public suffix that is itself a website (gov.uk, co.uk) is looked up as it is and charged if the web graph has data for it. Hosting domains such as github.io are scored as one site, so a small someone.github.io page shows the score of github.io.

Why is my site "not found"? No other domain links to it in the July-September 2026 web graph (or the crawl did not reach it). It is reported with authority 0 and not charged.

Why is the score different from Ahrefs DR or Moz DA? Different data and a different formula. Use one metric consistently when comparing sites.

Can I use the results commercially? Yes. Common Crawl data is free to use under its terms of use; Majestic Million is CC BY 3.0 (credit: "Majestic Million, majestic.com").

Support

Open an issue in the Issues tab with the domains and the run link. Issues are checked regularly.