Free tool

Score any domain in one second.

Get authority score, referring domain count, popularity rank, and registration data, all from a single domain lookup. Backed by our 3B+ page web index, Tranco rankings, and RDAP.

About

About this tool

Background

Domain authority is a relative score that estimates how likely a domain is to rank in search results. The score blends raw link signals (referring domains, total backlinks) with popularity proxies and historical signals like domain age. It's a useful first filter when scoring prospects, vetting guest-post sites, or comparing competitors.

RankParse computes authority scores from our link graph (the same dataset used by independent SEO researchers) and enriches each lookup with the Tranco popularity rank (top 100k) and registration data from RDAP.

How it works

Drop in a domain, hit submit. The tool returns an authority score (0–100), the count of referring domains pointing at the site, total raw backlinks, popularity rank if the domain is in the top 100k, and registration date and registrar. No signup, no credit card.

Free anonymous use is capped at 5 checks/day; a free account bumps that to 25. For programmatic scoring of hundreds or thousands of prospects, the REST API costs 1 credit per call and credits never expire.

API

Need this for 1,000 domains?

The same data is available via the REST API. Pay only for what you use; credits never expire.

# Same data, programmatically. First 100 credits free on signup
curl "https://api.rankparse.com/v1/domain-authority?domain=example.com" \
  -H "X-API-Key: rp_your_key"

FAQ

Frequently asked questions

More checks on the free tools page.

Beyond the free tools

Want your agent to run these for you?

Connect RankParse to Claude or ChatGPT and ask in plain words. 100 free credits, no card.