Backlink checker
Referring domains, total backlinks, backlink rank and spam score for any domain.
Enter a domain to see its backlink profile: referring domains, total backlinks, an authority-style backlink rank, average spam score, and broken-link counts. Useful for sizing a competitor's link profile, vetting a guest-post target, and tracking your own link growth. One UnifAPI SEO lookup per check.
How do I check a website's backlinks?
Enter a domain above. One lookup returns its referring domains, total backlinks, a 0–1000 backlink rank, its average spam score and its broken-backlink count.
Why not use Google Search Console?
Search Console shows links only for sites you have verified as yours. This checker works for any domain, so you can size a competitor or vet a guest-post target.
How much does a backlink check cost?
Sample checks are free and labeled as samples. A live check costs 50 credits ($0.05) from a UnifAPI workspace, and the first top-up adds a one-time 2,000-credit bonus.
What you can see, and what you can't
You can see
- Referring domains and total backlinks
- Backlink rank from 0 to 1000
- Average spam score from 0 to 100
- Broken backlinks
You can't see
- The list of single backlinks and anchors (a workspace can pull it from the API)
- Moz DA or Ahrefs DR (backlink rank is its own metric)
- Link growth over time from one check
Give this to your agent
Connect UnifAPI
Add to Claude(opens claude.ai in a new tab)Using ChatGPT, Claude Code or another client? See the setup steps
Paste this into your agent
connect the UnifAPI MCP server at https://mcp.unifapi.com and check how many referring domains and backlinks nike.com has
and let it take it from there.
Pay as you go from workspace credits · OAuth sign-in, no key to paste · read-only. Works in Claude, ChatGPT, Cursor and any MCP client.
API referenceBuilt on the UnifAPI gateway
Every result above is one API call against the same live public-data surface that UnifAPI Skills use. Agents can call the same data through MCP when a workflow needs evidence.
The concepts behind this tool
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Questions about this tool
What is backlink rank?
A 0–1000 authority-style score derived from the strength of a domain's backlink profile. It's directionally similar to Ahrefs Domain Rating or Moz Domain Authority, but it is its own metric — we don't claim parity with either.
What counts as a referring domain?
A referring domain is a unique website that links to the target at least once. It's usually a better link-equity signal than raw backlink count, because 1,000 links from one site matter less than links from 1,000 different sites.
What is the spam score?
An average, 0–100, of how spammy the referring pages look. A high spam score on a profile you didn't build can be a sign of a negative-SEO attack worth investigating.
Can I see every backlink, not just the summary?
Yes — a workspace can pull the full backlink and referring-domain lists with anchors, link types and first-seen dates. This free tool returns the headline summary so you can check a domain instantly.
Can I check a competitor's backlinks for free?
Yes — the checker is domain-agnostic, so enter any domain you don't own and its referring domains, total backlinks, backlink rank and spam score come back from the same lookup. Free sample checks cover this headline summary; a workspace can pull the competitor's full backlink list with anchors and first-seen dates.
Use the same data in your own agent.
Add UnifAPI once, then ask your assistant to fetch live public data with the same per-record pricing.
Using ChatGPT, Claude Code or another client? See the setup steps