A backlink API you pay for per call, not per month

What you can ask for

One endpoint, nineteen actions. domain and overview return Domain Rating and counts for free. refdomains lists the top referring domains of a target with link counts, pages, donor DR and first and last seen dates. backlinks returns individual links with source URL, anchor, rel, link type and date, filterable by follow status, source TLD, anchor, source domain, target URL and minimum donor DR. anchors and toppages summarise anchor text and the most-linked pages. bulk_dr scores up to 2,000 domains per call, compare lines up to 20 domains, and intersect finds referring domains shared by up to ten targets.

Pricing in plain numbers

One credit costs $0.0001. A lookup costs 1 credit, a list call 2, a search 3, and a list call can return up to 1,000 rows. That is $0.10 per 1,000 lookups and $0.20 per 1,000 list calls, with no subscription and no monthly minimum. The first sign-in with Google adds $100 of credit, enough for about a million lookups.

Where the data comes from

From our own backlink index built on Common Crawl: 181 million domains, 2.7 billion domain-to-domain links and about 798 billion page-level backlinks. It is refreshed roughly monthly, so a brand-new link can take weeks to appear, and coverage is smaller than the proprietary crawlers of the big SEO suites. There is no keyword research, rank tracking or site audit here: it is link data only.

Getting started

curl "https://apibacklinks.com/api.php?action=domain&q=example.com"\n\ncurl "https://apibacklinks.com/api.php?action=refdomains&q=example.com&key=YOUR_KEY"

Responses are JSON with CORS enabled. Pass the key as ?key= or as an Authorization: Bearer header. Full parameters are in the documentation; to compare with other providers see the alternatives hub.