README.md

---
title: 'Linkheft: Free Domain Authority Checker'
emoji: 🏋️
colorFrom: green
colorTo: indigo
sdk: static
pinned: false
license: mit
short_description: Domain authority 0-100, web rank & 4-month trend, open data
tags:
- seo
- domain-authority
- backlinks
- website-rank
- common-crawl
- link-building
- lead-generation
- cybermax
datasets:
- CyberMax-tools/open-domain-ranks
thumbnail: https://huggingface.co/spaces/CyberMax-tools/domain-authority-checker/resolve/main/thumbnail.png
---

# Linkheft: free domain authority checker

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> **Score your own domain list on the latest release, by API: $5 for 25,000 lookups.** **[Buy now →](https://data.cybermax-tools.workers.dev/buy/linkheft-api-pack?s=sp-open-domain-ranks-top)** · API key on screen the moment checkout ends · no subscription · [14-day refund](https://cybermax.cybermax-tools.workers.dev/terms#payments) if it doesn't work as described · help: cybermax.tools@gmail.com
> 
> **Need it fresh, filtered or via API?** This free file is a snapshot (the latest Common Crawl + Majestic release for 10.3M domains), last updated **2026-10-01**.
> - **[Linkheft domain authority API](https://data.cybermax-tools.workers.dev/buy/linkheft-api?s=sp-open-domain-ranks)** (1,000 free domain lookups a day, $5 for 25,000 (no expiry, no subscription), or $19/month for 100,000): returns the authority score, web rank, trend and Majestic links for up to 50 domains per call from this same data, always the latest release, by REST API or MCP.
> - **[Linkheft on Apify](https://data.cybermax-tools.workers.dev/buy/linkheft?s=sp-open-domain-ranks)** ($0.002 per domain ranked): scores any list of domains on demand (authority 0-100, rank, 4-month trend), via API, schedule or MCP.
> - **[DomainDNA API $5 pack](https://data.cybermax-tools.workers.dev/buy/domaindna-api-pack?s=sp-open-domain-ranks)** ($5 for 1,000 domain checks, never expires): tech stack, email provider, SPF, DMARC and domain age for your own domains, by REST API or MCP. Pay by card, your API key is on screen the moment checkout ends; no account, no subscription.
> - **[DomainDNA domain intel API (card checkout)](https://data.cybermax-tools.workers.dev/buy/domaindna?s=sp-open-domain-ranks)** (25 free domains a day, $5 for 1,000 (no expiry, no subscription), or $19/month for 5,000): checks tech stack (with evidence), email provider, SPF/DMARC and domain age for your own domains by REST API or MCP; pay by card in one click, key shown instantly, no Apify account needed (the DomainDNA Apify tool for bulk lists, TLS and monitor mode is linked from the same page).
> - **[DomainDNA on Apify](https://data.cybermax-tools.workers.dev/buy/domaindna-apify?s=sp-open-domain-ranks)** ($0.004 per domain analyzed): checks tech stack, TLS, SPF/DMARC and domain age for your own domain lists, with a monitor mode that returns only changes.
> - Using it at work? **[Commercial license + support](https://data.cybermax-tools.workers.dev/buy/dataset-license?s=sp-open-domain-ranks)** (from $49/year): invoice, PDF licence certificate, named support, freshness and availability commitments and an SLA; the data stays free and open for everyone.
> - **[Get an email when this dataset updates](https://data.cybermax-tools.workers.dev/notify?ds=open-domain-ranks&s=sp-open-domain-ranks)**: free, double opt-in, unsubscribe any time.
> - **[CyberMax Store](https://cybermax.cybermax-tools.workers.dev/store/?utm_source=hf-space&utm_medium=dataset&utm_campaign=open-domain-ranks)**: every CyberMax data product, API plan and weekly brief in one place.
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<!-- cm:demo -->
<video src="https://cybermax.cybermax-tools.workers.dev/media/demos/linkheft-api/demo-16x9.mp4" poster="https://cybermax.cybermax-tools.workers.dev/media/demos/linkheft-api/poster.jpg" controls muted loop playsinline width="100%"></video>

▶ **[Watch the 17-second demo](https://cybermax.cybermax-tools.workers.dev/media/demos/linkheft-api/demo-16x9.mp4)**: the live Linkheft API page with a real result, no voice. **[Try it / get it](https://linkheft-api.cybermax-tools.workers.dev/?utm_source=huggingface&utm_medium=readme&utm_campaign=demo-video)**
<!-- /cm:demo -->

Type any domain and get a 0–100 authority score, its rank among 133 million domains in the Common Crawl
web graph, a 4-month trend (rising / falling / stable) and referring subnets from the Majestic Million.
It's looked up live in your browser from the free
[Linkheft Open Domain Ranks](https://huggingface.co/datasets/CyberMax-tools/open-domain-ranks) dataset.

The page also ranks 117 well-known SaaS, AI and developer sites and lists the biggest risers and fallers.
The raw data is in `latest.json`.

To check thousands of domains at once (link prospects, lead lists, competitors) as CSV/JSON/Excel, or from
AI agents over MCP, use [Linkheft on Apify](https://apify.com/cybermax/domain-authority): $0.002 per ranked
domain, unranked domains free, no subscription.

Open score, not Moz DA or Ahrefs DR. Data: Common Crawl Web Graph; Majestic Million (CC BY 3.0). Made by CyberMax.

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**Try the paid tool:** [Linkheft on Apify](https://apify.com/cybermax/domain-authority): rank your own domain list by authority. First try costs cents; you pay only for results.

**More free from CyberMax:**
- [All free CyberMax demos & datasets](https://huggingface.co/spaces/CyberMax-tools/cybermax)
- [Keyfern: What People Search (Keyword Ideas)](https://huggingface.co/spaces/CyberMax-tools/what-people-search)
- [DomainDNA: SaaS Email Security Report](https://huggingface.co/spaces/CyberMax-tools/saas-email-security)
- [Linkheft Open Domain Ranks (10.3M domains)](https://huggingface.co/datasets/CyberMax-tools/open-domain-ranks)
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