Referring Domains API
All referring domains linking to any target with authority scores, link counts, and first-seen dates. Link prospecting from $0.03/call.
Get a deduplicated list of domains that link to a target, each with authority scores, total backlinks from that domain, and dofollow status. Perfect for understanding the breadth and quality of a link profile.
Try it live
Fill in the fields and hit Run to see a real response.
{
"ok": true,
"data": [
{
"domain": "techblog.io",
"domainAuthority": 74,
"totalBacklinks": 23,
"dofollow": 20,
"nofollow": 3,
"firstSeen": "2024-11-05",
"lastSeen": "2026-03-15"
}
]
}Features
Results are collapsed to one row per linking site, so a domain that links a hundred times appears once — the clean view you need for outreach and prospecting lists.
Each domain returns its domainAuthority and totalBacklinks, letting you rank referrers by strength and by how heavily they already link to the target.
Every referrer splits into dofollow and nofollow counts, so you can prioritize sites that pass equity over those that only link nofollow.
The firstSeen and lastSeen fields per domain reveal when a site started linking and whether it still does, powering link-velocity and lost-referrer tracking.
The limit field (default 100) controls how many domains return; with $0.006 per 100 rows added to the $0.04 call, even broad prospecting pulls stay inexpensive.
Use cases
Link Prospecting
Identify the highest-authority domains linking to competitors and prioritize them for your own outreach campaigns.
Link Velocity Tracking
Monitor how many new referring domains a site gains over time to detect link-building campaigns or penalties.
Quick start
Copy this snippet and start making calls.
const res = await fetch('https://api.yepapi.com/v1/seo/backlinks/referring-domains', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"target": "example.com",
"limit": 100
}),
});
const data = await res.json();
console.log(data);The referring domains API for developers — deduplicated linking sites with authority & velocity
The Referring Domains API returns one row per site that links to a target, each with its authority score, total backlinks from that domain, dofollow ratio, and first/last seen dates. It answers "who links here" rather than "every link here" — the right granularity for outreach and link-velocity analysis.
It is the deduplicated counterpart to the Backlinks List endpoint. Use both under one YepAPI key: the list for individual links, this endpoint for the unique sites behind them, and the Anchors endpoint for how they describe the target.
What is a referring domains API?
A referring domains API returns the set of distinct websites linking to a target, deduplicated so each site appears once no matter how many links it points. Each domain comes with domainAuthority, totalBacklinks from that site, a dofollow/nofollow split, and firstSeen/lastSeen dates. That is the metric SEOs actually track for authority — referring domains correlate with rankings more than raw link counts. YepAPI serves it at /v1/seo/backlinks/referring-domains: post a target and a limit, and get the unique linking sites as a JSON array ready to score or prospect against.
Build your own link prospecting tool
Build an outreach app that pulls a competitor's referring domains, filters to high-domainAuthority sites that link dofollow, and produces a prioritized contact list. The totalBacklinks field helps you find sites that link generously versus those that link once, and the lastSeen date flags relationships that may have lapsed and could be re-earned. Combine several competitors' referrers to surface the domains common to your whole niche — the warmest outreach targets.
Referring domains API pricing — $0.04 + $0.006 per 100 rows
Pricing is $0.04 per call plus $0.006 per 100 domains returned, so a default 100-domain prospecting pull costs roughly five cents and a deep sweep stays under a dime. The same referring-domain data is gated behind $399–$999/mo subscriptions elsewhere; here you meter it per call and build outreach lists for pennies.
Track link velocity over time
Snapshot a domain's referring sites on a schedule and diff the firstSeen dates to count new referrers gained per week — a clean link-velocity signal. A sudden spike can indicate a competitor's link campaign or a risky link scheme; a decline shows referrers dropping off. Because results are deduplicated, your velocity counts reflect real new relationships, not the same site adding more links to an existing partnership.
Try the referring domains API free
New accounts get $5 of free credit with no card required — enough for dozens of prospecting pulls. Test it against a competitor you know, confirm the authority and dofollow fields rank sites the way you expect, and wire the deduplicated list into your outreach pipeline before paying.
Start making API calls in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Get a deduplicated list of domains that link to a target, each with authority scores, total backlinks from that domain, and dofollow status. Perfect for understanding the breadth and quality of a link profile.
Each API call costs $0.04 (+$0.006 per 100 rows). No monthly minimums or subscriptions — you only pay for what you use.
Sign up for a free API key, then send a POST request to /v1/seo/backlinks/referring-domains. Check the code example above for a ready-to-use snippet in JavaScript, cURL, or Python.
YepAPI bundles SEO, AI, and web scraping APIs under one key with no monthly minimums. You get lower per-call pricing, a unified dashboard, and one billing account instead of managing multiple providers.
Ready to integrate?
Get your API key and start making calls in 30 seconds. $5 free credit on signup — no credit card required.
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