Free domain authority checker API: score 50 domains in one call
Send up to 50 domains in one call and get an authority score from 0 to 100, the web rank, a 4-month trend and Majestic links, from Common Crawl web-graph and Majestic Million data. REST API and MCP server; the first 1,000 lookups every day are free with no key.
Linkheft vs the alternatives
Published prices, each checked on the date shown; prices change, so confirm on each site.
| Product | Price | Free | Checked |
|---|---|---|---|
| Linkheft API | $5 once for 25,000 lookups; $19/month for 100,000 | 1,000 lookups every day, no key | live |
| Moz API | Starter $20/mo = 3,000 rows, $75/mo = 15,000 rows (overage $5/1,000); Growth $125/mo = 50,000, $250/mo = 120,000, $500/mo = 500,000; Advanced $2,000/m | 50 rows/month | 2026-09-29 |
| DataForSEO Backlinks API | Summary API (live mode): $0.024 per request + $0.000036 per row, pay as you go | not verified | 2026-09-29 |
| Ahrefs API | API and MCP access inside Lite $129/mo (1,000 API credits per user), Standard $249/mo, Advanced $449/mo; Enterprise $1,499/mo uncapped API (annual com | free test queries only | 2026-09-29 |
| OpenPageRank (Keywords Everywhere) | Bronze 100,000 domains/month, Silver 200,000, Gold 1,000,000 via Keywords Everywhere plans: Bronze $84/year, Silver $168/year, Gold $480/year (https:/ | 30,000 domains/month, 60 requests/min, up to 100 domains per request | 2026-09-29 |
Why teams pick Linkheft
- 1,000 free lookups every day; Moz API lists 50 free rows a month.
- $19/month for 100,000 lookups; Moz Growth is $125/month for 50,000 rows.
- 50 domains per call, with a trend and Majestic links on every row.
- Instant key, no account; the same key works on the MCP server for AI agents.
Try it in one call
curl 'https://linkheft-api.cybermaxtools.com/api/rank?domain=stripe.com,notion.so'FAQ
Is there a free domain authority API?
Yes: Linkheft gives 1,000 domain lookups a day with no key, up to 50 domains per call.
Is this the same score as Moz DA?
No. Linkheft scores domains from Common Crawl web-graph centrality and the Majestic Million, on a 0-100 scale. It is its own score, not Moz Domain Authority.
How fresh is the data?
Each answer says which data release it comes from (GET /api/dataset); the API always uses the latest release.
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