> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.1lookup.io/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Domain authority: score a site's search strength

Domain Authority gives a root domain an authority score, along with its rank, organic traffic, keyword counts and what that traffic would be worth to buy. Use it to qualify a link prospect, compare competitors or triage a long list of domains.

## What it tells you

- An authority score for the domain, and a rank that places it against other sites.
- An estimate of the organic search traffic the domain receives.
- How many organic keywords it ranks for, and the dollar value of that traffic if you had to pay for it.
- Whether the domain runs paid ads, plus its paid keyword count, paid traffic and the share of its traffic that is paid.
- Whether a record for the domain was found at all.

## What you need to provide

One input: the root domain you want scored, for example "stripe.com".

## What it costs

10 credits per lookup. Live per-product costs are shown on the Billing page in your dashboard.

## How to run it

- In the dashboard: Domain Authority
- From your code: POST /v1/domain-authority, then see the Developer Hub at app.1lookup.io/developer-hub.

## Good to know

- Traffic, traffic value and keyword counts are estimates of search performance, not figures taken from the site's own analytics.
- If the lookup reports the domain as not found, there is no record for it and you will not get scores back. Check that flag before reading the rest.
- Results are point-in-time. Rankings and traffic move week to week, so re-run before you act on an old result.
- Domain SEO Intelligence returns authority, backlink counts and traffic estimates in one call if you want the wider picture.
- The paid fields are useful on their own: they tell you whether a site is buying traffic as well as earning it, which changes how you read the traffic number.