Backlinks

One call that summarises a domain's link profile. Use it to size a competitor's authority before deciding whether to compete on content or on links.

POST/v1/domains/backlinks

Backlinks summary

Totals for the whole domain including subdomains, with internal links excluded.

Costs 4.5 credits per call.

Required attributes

Name
domain
Type
string
Description
A bare domain such as example.com. Protocol, www. and paths are stripped.

Response fields

Name
rank
Type
integer
Description
Domain rank from 0 to 1000, based on the quality and quantity of links.
Name
referring_domains
Type
integer
Description
Distinct domains linking to the target. Usually the number that matters.
Name
nofollow_backlinks
Type
integer
Description
Links carrying rel=nofollow.
Name
spam_score
Type
integer
Description
0 to 100. Higher means more links from suspicious sources.
Name
top_tlds
Type
array
Description
Top level domains of the linking sites, by link count.
Name
link_types
Type
array
Description
anchor, image, redirect, canonical and so on.
Name
top_countries
Type
array
Description
Countries of the linking sites, by link count.

Request

POST

/v1/domains/backlinks

curl -X POST https://suvjexogmfpvxjcktvuk.supabase.co/functions/v1/api/v1/domains/backlinks \
  -H "Authorization: Bearer $PENGU_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"domain": "hubspot.com"}'

Response

{
  "data": {
    "domain": "hubspot.com",
    "checked_at": "2026-09-09T11:47:23.500Z",
    "rank": 679,
    "backlinks": 29053738,
    "referring_domains": 384860,
    "referring_main_domains": 333298,
    "referring_ips": 129902,
    "referring_pages": 22169548,
    "broken_backlinks": 186430,
    "broken_pages": 174114,
    "nofollow_backlinks": 966161,
    "sponsored_backlinks": 14181,
    "spam_score": 5,
    "first_seen": "2019-01-15 22:57:10 +00:00",
    "top_tlds": [
      {
        "name": "com",
        "count": 14879506
      },
      {
        "name": "org",
        "count": 751402
      },
      {
        "name": "blogspot.com",
        "count": 512841
      },
      // ...
    ],
    "link_types": [
      {
        "name": "anchor",
        "count": 11777768
      },
      {
        "name": "image",
        "count": 10268383
      },
      {
        "name": "redirect",
        "count": 86656
      },
      // ...
    ],
    "top_countries": [
      {
        "name": "US",
        "count": 8437285
      },
      {
        "name": "",
        "count": 4870336
      },
      {
        "name": "WW",
        "count": 3208828
      },
      // ...
    ]
  },
  "meta": {
    "credits_charged": 4.5,
    "credits_remaining": 483.5,
    "request_id": "7f1a4da0-ae05-4890-89b8-f8503d33b697"
  }
}