181,132,097 domains in the index
Domain rating checker with a reference for every term
Type a domain, get its 0-100 DR and referring-domain count. Every number then links to a short entry saying what it means, how it is computed and where it stops being reliable.
- Free lookup, no key and no card
- DR formula published in full
- One short entry per term and API field
$ curl "https://rankupedia.com/api.php?q=nytimes.com&action=overview&key=sk_live_..."
Who it is for
What a domain rating checker returns, entry by entry
A domain rating checker returns one integer between 0 and 100. That integer is derived from a single input: the number of distinct domains that link to the target.
The formula is public. DR equals round(100 times the natural log of referring domains plus one, divided by the natural log of twenty million). A site with 1,000 referring domains lands on 41, and one with 1,000,000 lands on 82. The scale is logarithmic, so early links move the number far more than late ones.
Rankupedia is organised like a small encyclopaedia. Each page defines a cluster of terms. Claims stay inside what our own crawler and our own link index can show. The formula entry is the best starting point, and the glossary covers the vocabulary around it.
Entries carry a date. When Google changes how it treats links, as it did with the September 2019 introduction of rel=sponsored and rel=ugc, the entry says so.
How it works
Looking up a term or a domain
Run the free lookup
Enter a domain in the box above. The call uses the free domain action, so no key is needed.
Find the field in the reference
The API field entry names each parameter and the two fields present in every authenticated response.
- domains in our link graph
- 181,132,097
- domain-to-domain links
- 2,774,625,913
- backlinks indexed
- ~798.5 billion
- free credit on sign-up, no card
- $100
Compare
Four metrics that sound alike
| Name | Published by | Scale | What it is not |
|---|---|---|---|
| DR (this site) | Rankupedia | 0-100, log of referring domains | Not Ahrefs DR and not Moz DA |
| Domain Rating | Ahrefs | 0-100 | Not a Google signal |
| Domain Authority | Moz | 1-100 | Not a Google signal |
| Authority Score | Semrush | 0-100 | Not comparable to DR |
What it is for
Where the reference is used
Readers arrive with one narrow question. Four entries cover most of them.
Reading a vendor report
A client sends a PDF full of abbreviations. The glossary defines each one in a line or two.
Writing an integration
Parameters, sort order and pagination limits are tabulated in the field entry.
Settling an argument
Whether DA matters to Google has a myth-and-reality entry.
Budgeting a run
One credit costs $0.0001. A table of actions shows what a 10,000-domain screen costs.
Scope of this reference
Exact about links, silent about the rest
Everything here concerns link data. Keyword research, position monitoring and a crawl refreshed every day are outside it; for those, pay Ahrefs or Semrush.
- Index refreshed roughly once a month
- DR is our own metric
- No entry predicts a ranking
FAQ
Questions the reference is asked most
What is a domain rating checker and what does it measure?
It is a lookup that converts the count of referring domains into a 0-100 score. Ours uses a published log formula, so you can reproduce any result by hand. It measures link breadth, not content quality, traffic or the chance of ranking.
Is there a free DR checker without sign-up?
Yes. The box at the top calls the free domain action and needs no key. The overview, stats and suggest actions are also free. Calls that list rows, such as backlinks or anchors, cost credits.
Why does my score differ from Ahrefs or Moz?
Each vendor crawls its own web and uses its own formula. Ours is derived only from referring-domain count, while Ahrefs and Moz keep their methods private. Expect the same rough order of magnitude and different exact numbers.
How often does the data change?
About monthly. A link won last week may be missing, and a dead one may linger. Looking daily mostly shows the same snapshot, so a monthly rhythm is the honest one.
What does the API cost per call?
One credit is $0.0001. Free actions cost nothing, bulk_dr costs 1 credit for up to 2,000 domains, listing actions cost 2, and search or keyword cost 3. See the cost table for all of them.
Does Google use domain rating?
No. Google has said publicly that it does not use third-party scores such as Domain Authority, and DR is the same kind of thing. It is a convenient proxy for link breadth and nothing more.