Frequently asked questions
Short answers about the score, the data, and what this site does and doesn’t do.
Is it really free?
Yes. Checking any domain is free without an account; a free account adds a dashboard for tracking domains over time. The data source is open, and so is the method.
How is the site funded?
By its operator, and by clearly-labeled sponsorships: companies can rent a marked “Sponsor” placement on a few surfaces around the content — see the sponsor page. Sponsors never appear inside score tables, domain pages, the API, or badges; sponsor links carry rel="sponsored" and pass no ranking credit; and sponsorship buys zero influence over scores. No third-party ad networks or tracking scripts run here — sponsor creatives are static images we serve ourselves.
Why does my domain have no score?
Because it has too little presence in the Common Crawl link graph for an honest number. We show the gap instead of estimating. New or very small domains usually appear in the graph once other sites link to them.
How often do scores update?
Common Crawl publishes a new domain graph roughly monthly, each built from about three months of crawling. Every known domain is re-scored automatically when a release lands, and each release becomes one point in the trend.
Is OAR comparable to Ahrefs DR or Moz DA?
No. Those are proprietary scores over private link indexes. OAR is computed from public data with a published formula. The scales look similar (0 to 100) but the numbers mean different things.
Can I raise my OAR?
The formula sees exactly one thing: your domain's ranks in the public web graph, which move when domains that matter in that graph link to you. Nothing here is for sale, scores are never adjusted manually, and we don't offer SEO advice or promise outcomes.
Where does the data come from?
The domain-level ranks files that Common Crawl publishes with each crawl release, openly downloadable at commoncrawl.org. The exact formula is on the methodology page.
Why did my score change without my site changing?
OAR is relative to the whole graph of a release. When the web around you changes, or Common Crawl's crawl composition shifts, ranks move. That is also why trends matter more than single points.
Do you have an API?
Yes: GET /api/v1/domains/{domain} returns the score, both graph ranks, and the release, with no key required. It’s documented on the data page, along with the per-IP rate limits. For bulk work, the underlying Common Crawl files are public and the formula is published.
Who runs this site?
Dream Ops B.V., a Dutch company — see the about page and the imprint for the legal details.
How do I report incorrect data or abuse?
Through the contact page. Include the domain and what’s wrong. Reports are read by a human; scores are never adjusted by hand, but broken data and abusive content are acted on.
What changed recently?
Every algorithm version and data-policy change is recorded on the changelog; live ingest state is on the status page.