InstaRank SEO
Backlink API

Backlink API

Pull a domain's backlink profile summary — total backlinks, referring domains, domain rank, spam score, and the dofollow/nofollow split.

POST/api/v1/backlinks$0.05 per domainscope backlinks:read
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Quick start

One request, structured JSON back

Request
curl -X POST https://instarankseo.com/api/v1/backlinks \
  -H "X-API-Key: isk_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{"domain": "example.com"}'
Response
{
  "success": true,
  "domain": "example.com",
  "summary": {
    "totalBacklinks": 1820, "referringDomains": 412, "domainRank": 38,
    "spamScore": 12, "dofollowCount": 1400, "nofollowCount": 420
  },
  "distributions": { "tldDistribution": { "com": 900 },
    "countryDistribution": { "US": 700 } },
  "meta": { "creditsUsed": 50, "creditsRemaining": 18950, "apiVersion": "1.0" }
}
Reference

Parameters

FieldTypeRequiredDescription
domainstringrequiredTarget domain (hostname or URL).
Why this API

Built for builders

Whole-profile snapshot

Total backlinks, referring domains, referring IPs, domain rank, and spam score in one response — the headline link metrics at a glance.

Link quality breakdown

See the dofollow vs. nofollow split plus UGC and sponsored counts to judge link-profile health, not just raw volume.

Distributions included

Link types, platform types, TLD, country, and semantic-location distributions ship in the same call for deeper analysis.

Transparent

Pricing & limits

Price

$0.05 per domain

50 credits per domain

Billed from one credit wallet. Failed upstream calls are refunded automatically.

Rate limits

  • Free10 / min
  • SEO+60 / min
  • Agency120 / min

Surfaced as X-RateLimit-* headers on every response.

Errors

Every non-2xx shares one envelope with a machine-readable code, a retryable flag, and a requestId for tracing.

Send an Idempotency-Key header to retry POSTs safely without double-charging.

A complete backlink-profile summary for a nickel a domain — no seat-based subscription, no per-tool minimum.

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Last updated:

FAQ

Backlink API FAQ

Common questions about the Backlink API — pricing, auth, and what it returns.

  • What does the Backlink API return?

    A summary of a domain's backlink profile: total backlinks, referring domains and main domains, referring pages and IPs, domain rank, spam score, broken backlinks, and the dofollow / nofollow / UGC / sponsored split — plus distributions by link type, platform, TLD, and country.

  • How much does it cost?

    Fifty credits per domain, which is $0.05 at the standard rate. If the upstream data provider is unavailable the credit is refunded automatically.

  • Does it return individual backlinks?

    This endpoint returns the profile summary and distributions, which is what most monitoring and qualification workflows need. It is designed to be fast and cheap to call across many domains.

  • What is domain rank?

    Domain rank is a 0–1000 authority signal for the domain based on the quality and quantity of its backlinks — a quick proxy for how much link equity a site carries.

  • Which scope is required?

    The backlinks:read scope on your API key, sent in the X-API-Key header.