Domain Authority Checker: Backlink Rank from Open Data

Paste a list of domains and get, for each one, its Majestic Million global rank, referring subnets and referring IPs, the change since the previous list, and a 0-100 open authority score. Optionally add your own free Open PageRank key for a 0-10 PageRank. No paid SEO tool is scraped: the data comes from open, licensed sources.

USD 1 per 1,000 domains, plus a small start fee per run (see Pricing). Invalid inputs are free.

Read this first: the Majestic Million lists the top 1 million domains on the web by referring subnets. Most small-business and local sites are not in it. For those, this actor says so plainly (inMajesticTop1M: false) and, only if you add an Open PageRank key, gives them a PageRank. It never makes up a number.

What people use it for

• Vet a guest-post or link-building list. Sort hundreds of candidate sites by referring subnets and drop the ones with no real link profile before you pay for a placement.
• Rank sales prospects by size. Put your prospect domains in, sort by the open authority score, and start outreach with the biggest sites.
• Weekly rank-movement report. Majestic refreshes the list daily. Schedule a weekly run and watch rankChange and refSubnetsChange for your own site and your competitors.
• Screen affiliate and partner applications. Check every applicant's site in one run instead of opening an SEO tool for each one.

Sample output

Real Majestic Million values from the 2026-10-05 list (default input, no Open PageRank key):

domain	openAuthorityScore	majesticGlobalRank	refSubnets	refIPs	rankChange	inMajesticTop1M
shopify.com	85	92	67,272	181,669	0	true
python.org	80	280	34,934	64,501	-2	true
apify.com	60	15,951	2,615	6,284	212	true
crawlee.dev	47	347,667	464	718	-8,101	true
example-small-site-that-is-not-ranked.com	null	null	null	null	null	false

One full row:

{
  "input": "https://apify.com/store",
  "domain": "apify.com",
  "inMajesticTop1M": true,
  "majesticGlobalRank": 15951,
  "majesticTldRank": 7711,
  "tld": "com",
  "refSubnets": 2615,
  "refIPs": 6284,
  "prevGlobalRank": 16163,
  "prevRefSubnets": 2593,
  "prevRefIPs": 5998,
  "rankChange": 212,
  "refSubnetsChange": 22,
  "openAuthorityScore": 60,
  "openPageRank": null,
  "openPageRankRank": null,
  "majesticListDate": "2026-10-05",
  "checkedAt": "2026-10-05T16:40:00.000Z",
  "source": "Majestic Million (CC BY 3.0)",
  "error": null
}

Input

Field	What it does
domains	Domains or URLs, one per line. Each is reduced to its registered domain with the Public Suffix List: https://www.python.org/downloads/ becomes python.org, bbc.co.uk stays bbc.co.uk, blog.example.com becomes example.com. Duplicates are checked once. Invalid entries (spaces, IP addresses, unknown TLDs, empty lines) get a row with an error and are free.
openPageRankApiKey	Optional, your own free Open PageRank key (stored as a secret input). Adds openPageRank (0-10) and openPageRankRank.
maxDomains	Check at most this many unique domains (default 1,000, up to 100,000). Domains past the limit are skipped and not charged.
includeNotRanked	On by default. Turn off to leave out domains that are not in the Majestic top 1 million; left-out domains are not charged.

Output fields

Field	Meaning
input, domain	What you typed, and the registered domain that was checked.
inMajesticTop1M	true when the domain is in today's Majestic Million, false when the whole list was read and it is not there.
majesticGlobalRank, majesticTldRank, tld	Position in the full list and within its top-level domain.
refSubnets	Referring subnets: how many distinct IP subnets (class C) host pages that link to the domain. Majestic ranks the list by this number. It is hard to inflate, because links from many sites on one server count once.
refIPs	Referring IP addresses that link to the domain.
prevGlobalRank, prevRefSubnets, prevRefIPs	The same values from Majestic's previous list.
rankChange	prevGlobalRank - majesticGlobalRank. Positive means the domain moved up.
refSubnetsChange	refSubnets - prevRefSubnets.
openAuthorityScore	Our open score, 0 to 100 (see below). null for domains outside the top 1M.
openPageRank, openPageRankRank	Only with your Open PageRank key: the 0-10 score and its global rank. null when Open PageRank has no score for the domain.
majesticListDate	The date of the Majestic list used (from the file's Last-Modified header).
source	The data sources behind the row, with licence.
error	Why a row has no data (invalid input), or an Open PageRank problem (bad key, quota used up). Majestic values in the same row are still valid.

The run's key-value store also holds a SUMMARY record: counts, the Majestic list date, how many rows were read, the download time, and the top 1M cutoff (the referring subnets of the domain ranked 1,000,000; 266 on the 2026-10-05 list).

The open authority score

openAuthorityScore = round(100 * log10(refSubnets + 1) / log10(maxRefSubnets + 1)), where maxRefSubnets is the referring-subnet count of the number 1 domain in the same list (google.com, 509,656 on 2026-10-05). So the top domain scores 100, and the scale is logarithmic like the link graph itself. Because the list stops at 1 million domains, ranked domains score from about 43 (the cutoff) to 100.

This is our own open score computed from Majestic's published numbers. It is not Moz Domain Authority, Ahrefs Domain Rating or Majestic Trust Flow, and it will not match them.

What "not in the top 1M" means

The actor reads the whole Majestic list. If a domain is not there, it has fewer referring subnets than the domain in position 1,000,000 (the cutoff in the run summary). That is a real answer, so it is charged like any other domain. It does not mean the site has no links.

Optional: Open PageRank key

Open PageRank scores over 100 million domains from the Common Crawl web graph, so it covers many sites outside the Majestic top 1M. To use it:

1. Sign in at openpagerank.keywordseverywhere.com with a Keywords Everywhere account and create an OPR API key on the dashboard. The free plan includes 30,000 domains per month.
2. Paste the key into Open PageRank API key.

The actor checks your remaining monthly allowance first, sends at most 100 domains per request and at most one request per second, and stops when the allowance is used up: the remaining rows say Open PageRank monthly quota used up and keep their Majestic data. A rejected key is reported in error on every row, and the Majestic data is still delivered. Each domain looked up counts against your Open PageRank allowance. Your key is sent only to the Open PageRank API and is never written to the log or the dataset.

Pricing

What	Price
Domain checked (ranked, or confirmed not in the top 1M)	USD 0.001 (USD 1 per 1,000)
Run start (covers downloading the 81 MB Majestic list once per run)	USD 0.01 per run
Invalid input, domains past maxDomains, domains left out by includeNotRanked	Free

Examples on the free plan:

• The default input (5 domains): 0.01 + 5 x 0.001 = USD 0.015.
• 1,000 domains: 0.01 + 1.00 = USD 1.01.
• 10,000 domains: 0.01 + 10.00 = USD 10.01.

Higher Apify plans get a discount on the per-domain price. You can set a maximum cost per run in the run options; the actor stops cleanly when it is reached and keeps every row written so far. Open PageRank itself is free up to your plan's monthly allowance and is billed by Keywords Everywhere, not here.

Schedule it weekly

Save your list as a task, schedule it weekly, and export the dataset to Google Sheets, a webhook or Slack. The movement view shows rank and referring-subnet changes side by side.

Limits and honesty

• Small sites are usually outside the Majestic top 1M. Without an Open PageRank key they only get inMajesticTop1M: false.
• Registered domains only. Subdomains are reduced to their registered domain (en.wikipedia.org is checked as wikipedia.org). Majestic also lists some large subdomains separately; this actor reports the registered domain.
• One list per run. Every run downloads the current Majestic Million once (about 28 MB compressed) and reads it as a stream. The download takes most of the run time. If the connection breaks, the actor resumes from where it stopped; if that also fails, domains not yet found get an error and are not charged.
• It never visits the domains you enter. It only talks to the Majestic download server and, with your key, the Open PageRank API.
• The Majestic list is updated daily; the date used is in every row.

What this does not do

• It does not scrape or call Ahrefs, Moz, Semrush, Similarweb or Majestic's paid API, and it does not give their metrics (no Domain Rating, Domain Authority, Trust Flow or Citation Flow).
• It does not list backlinks, anchor texts or referring domains one by one; it gives counts and ranks.
• It does not estimate traffic.
• It does not use the Tranco list, because its default list includes Cloudflare Radar data under a non-commercial (CC BY-NC 4.0) licence.

Data sources and attribution

• Majestic Million. Contains Majestic Million data, CC BY 3.0, majestic.com. Licensed under the Creative Commons Attribution 3.0 Unported License. The values in the Majestic fields are passed through as published; rankChange, refSubnetsChange and openAuthorityScore are our own calculations from them. This actor is not affiliated with or endorsed by Majestic.
• Open PageRank (only with your key): scores from openpagerank.keywordseverywhere.com, derived from Common Crawl. Used under your own account and their terms. This actor is not affiliated with or endorsed by Open PageRank or Keywords Everywhere.

Related actors

• SEO Audit & AI Search Readiness Checker (GPTBot, llms.txt): Crawl a site and audit every page for SEO basics (title, meta, H1, canonical, hreflang, noindex, alt text, JSON-LD, status, speed) plus...
• Bulk WHOIS Lookup (RDAP): Domain Availability & Expiry Checker: WHOIS lookup for thousands of domains through RDAP, the official successor to WHOIS: available or registered, registrar, creation date,...
• Tech Stack Detector: Website Technology Lookup in Bulk: Website technology lookup in bulk: the CMS, ecommerce platform, analytics, frameworks, CDN, hosting, payment, email and marketing tools...
• Company Enrichment From Domain: Tech Stack, Socials, Hiring: Company enrichment from a list of website domains: company name, description, official social links, tech stack (CMS, ecommerce,...

FAQ

Why is a well-known local business "not in the top 1M"? The list holds only the 1 million domains with the most referring subnets on the whole web. Add an Open PageRank key for a score on smaller sites.

Why do I pay for "not in the top 1M"? Because the actor read the whole list to confirm it; that is the answer you asked for. Invalid inputs and anything not checked are free.

Can I check 100,000 domains? Yes. The list is downloaded once per run, whatever the number of domains, so large runs cost mostly the per-domain price.

Something missing or wrong? Open an issue on the actor page with the domain.