Domain authority API for agencies, with domain strength and backlinks in one call
A domain authority API returns a 0 to 100 strength score for any domain, so your dashboards and prospect lists can sort sites by link quality without a manual lookup. SeoData's API returns Domain Strength, its own 0 to 100 score, together with referring domains, estimated traffic and top keywords. Agency includes 100 000 rows a month for 149 USD on yearly billing (299 USD monthly).
Check a domain below, then create your account and generate an API key.
What you get from a domain authority API
You send a domain and a market, and the response carries the score plus the data that explains it. On SeoData the call is GET /v1/domain/overview and it returns Domain Strength, visibility, estimated organic traffic, keywords in the top 10 and top pages. A second call, GET /v1/referring-domains, lists each linking site with its own strength, link count and new or lost status, so a score change in a client report can be traced to the links behind it.
One point to settle before you buy. Domain Authority is the name of a Moz metric, and SeoData does not return Moz's number. Our score is called Domain Strength and is built from the quality and diversity of referring domains, as described on the domain authority checker page. It works the same way for sorting and comparing, but the numbers are not interchangeable with Moz's.
Moz API and SeoData API for domain scores side by side
Moz figures come from its public API pricing page, checked in November 2026. Confirm current prices on moz.com before you budget.
| Moz API | SeoData API | |
|---|---|---|
| Score returned | Domain Authority and Page Authority | Domain Strength, SeoData's own 0 to 100 score |
| Free tier | 50 rows | None, paid plans only |
| Entry price | 20 USD per month for 3 000 rows | Agency, 149 USD per month yearly for 100 000 rows |
| Mid volume | 125 USD per month for 50 000 rows, 250 USD for 120 000 rows | Same Agency plan, 100 000 rows |
| Large volume | 500 USD per month for 500 000 rows | Enterprise, 1 000 000 rows at 499 USD per month yearly |
| Overage | 5 USD per 1 000 rows on Starter, 25 to 10 USD per 10 000 rows on Growth | Quota shown in every response |
| Also in the plan | Link and keyword API data | App with 10 seats, white-label PDFs, position tracking, audits |
| Best for | Teams that need Moz's own DA number or only a few thousand lookups | Agencies that want score, links, traffic and reports on one bill |
Where Moz wins: it is the original source of the DA metric, and at a few thousand rows a month its 20 USD tier costs less than ours. If a client or a procurement form names Moz Domain Authority, keep Moz for that field.
Who uses a domain authority API
- Link building teams that score 2 000 to 10 000 prospect domains before outreach and drop weak ones automatically.
- Agencies that show a strength score and its trend for 10 to 50 client domains in their own portal.
- SaaS and lead-gen tools that need a quick quality number for a domain a user types in.
- Reporting setups that pull the score into a spreadsheet or BI tool once a week.
From API key to first score in four steps
Create your account and pick Agency or Enterprise on the pricing page.
Generate an API key in the dashboard.
Call the domain overview endpoint with the domain and market and read domain_strength from the response.
Call the referring domains endpoint when you need the links behind the number. Request formats are on the SEO API page.
What scoring 5 000 prospects and 20 clients costs in rows
A link building team scores 5 000 prospect domains in one batch. Each overview call is one row, so the batch uses 5 000 rows. Add 20 client dashboards refreshed weekly, each with one overview row and 50 referring domains, and that is about 4 200 rows a week, 17 000 a month. Both together stay under 25 percent of the 100 000 row Agency quota at 149 USD per month yearly. On Moz the same volume sits in the 125 USD tier, with no app or reports in the price. For the broader price picture see Moz API pricing and the backlink API comparison.
Domain authority API questions
What is a domain authority API?
A domain authority API returns a 0 to 100 link strength score for a domain through an HTTP request, so you can show it in a dashboard, report or prospecting tool. Moz owns the Domain Authority name. SeoData returns its own score, Domain Strength, from the same overview call that includes traffic and top keywords.
How much does the Moz domain authority API cost?
Moz lists a free tier of 50 rows, then 20 USD a month for 3 000 rows, 75 USD for 15 000, 125 USD for 50 000, 250 USD for 120 000 and 500 USD for 500 000 rows. Overage is billed per 1 000 or 10 000 rows depending on the tier. Check moz.com for current prices.
Can SeoData return Moz Domain Authority?
No. SeoData does not return Moz Domain Authority or Page Authority, because those are Moz metrics. It returns Domain Strength, its own 0 to 100 link score. If a client contract names Moz DA specifically, keep the Moz API for that field and use SeoData for the rest.
Is there a free domain authority API?
Moz offers a free tier of 50 rows, enough to test a script but not to run client dashboards. SeoData has no free API quota. Agency starts at 149 USD per month on yearly billing with 100 000 rows, which suits agencies that refresh many domains on a schedule.
How many domains can I score a month on SeoData Agency?
Agency includes 100 000 API rows a month. A domain overview call returns one row, so you can score tens of thousands of domains a month. Prospect lists of 5 000 domains cost 5 000 rows, about 5 percent of the quota.
What else does the domain authority API return?
The domain overview endpoint returns Domain Strength, visibility, estimated organic traffic, keywords in the top 10 and top pages. The referring domains endpoint adds each linking site with its own strength, link count and new or lost status. See the full list on the SEO API page.
Get a domain authority API with the app and reports in the same plan
Create your account, generate a key and score your first domains in minutes.