SEO API · Website Backlinks

Website Backlinks

The top inbound links pointing at an entire domain.

Discover who links to a domain: the linking sites, the exact source and target pages, and the anchor text — the raw material for link-building, competitor research and disavow audits.

POST /api/v1/backlink/website $0.02 / request

Get API Key

Use your Seonio API key instantly.

Open Playground

curl

curl -X POST https://seonio.com/api/v1/backlink/website \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $SEONIO_API_KEY" \
  -d '{"target": "moz.com"}'

Sample response

{
  "backlinks": [
    {
      "anchor_text": "beginner\u0027s guide to SEO",
      "domain_source": "en.wikipedia.org",
      "url_source": "https://en.wikipedia.org/wiki/Search_engine_optimization",
      "url_target": "https://moz.com/beginners-guide-to-seo"
    },
    {
      "anchor_text": "Domain Authority",
      "domain_source": "backlinko.com",
      "url_source": "https://backlinko.com/hub/seo/domain-authority",
      "url_target": "https://moz.com/learn/seo/domain-authority"
    }
  ],
  "source": "moz.com",
  "updated_at": "2026-06-30T12:00:00"
}

Request and response

The full contract for /api/v1/backlink/website — what to send and what comes back.

Request body

target string required

A bare domain, e.g. "moz.com".

Response fields

`source`	string	The domain or URL the backlinks point to.
`updated_at`	string \| null	When the backlink set was last refreshed (ISO 8601), or null for a completed lookup with no data.
`backlinks[]`	object[]	Inbound links, each as { domain_source, url_source, url_target, anchor_text }.
`backlinks[].domain_source`	string	The linking site's domain.
`backlinks[].url_source`	string	The exact page the link is on.
`backlinks[].url_target`	string	The page on your target the link points to.
`backlinks[].anchor_text`	string	The clickable anchor text of the link.

Code examples

Copy, paste, swap in your API key.

curl -X POST https://seonio.com/api/v1/backlink/website \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{"target": "moz.com"}'

import requests

resp = requests.post(
    "https://seonio.com/api/v1/backlink/website",
    headers={"X-API-Key": "YOUR_API_KEY"},
    json={"target": "moz.com"},
)
print(resp.json())

const resp = await fetch("https://seonio.com/api/v1/backlink/website", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-API-Key": "YOUR_API_KEY",
  },
  body: JSON.stringify({"target": "moz.com"}),
});
console.log(await resp.json());

Playground

Run a real /api/v1/backlink/website request. No key? We show the real sample result so you can still inspect the shape.

API key

JSON body

Leave the API key empty to load the built-in sample response.

Request

POST /api/v1/backlink/website

sample mode

What developers build with it

Common ways Website Backlinks ends up in production.

Link-building prospecting from a competitor's profile.

Anchor-text distribution analysis for a domain.

Spotting toxic or spammy linking domains.

Status codes

The same predictable contract on every endpoint.

`200`	Success. The lookup completed and was charged, even if the response is empty.
`401`	Missing or unknown API key.
`402`	Not enough balance on the account.
`422`	Invalid request body (wrong shape or types).
`429`	Rate limit exceeded (fixed-window default: 30 requests / 3 seconds).

Other endpoints

Explore the rest of the SEO API.

Keyword Research

/api/v1/keywords/global

Keyword Clustering

/api/v1/keywords/clustering

Keyword Suggestions

/api/v1/keywords/suggestions

Keyword Metrics by Country

/api/v1/keywords/country

SERP

/api/v1/serp/country

SERP Scraper

/api/v1/serp/scraper

Scraper

/api/v1/scraper

Website Traffic

/api/v1/website/traffic

Website Ranking

/api/v1/website/ranking

URL Stats

/api/v1/url/stats

Website Stats

/api/v1/website/stats

URL Backlinks

/api/v1/backlink/url

API Balance

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Balance never expires.

A first top-up to kick the tires.

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$ 100 one-time

+15% bonus
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The sweet spot for steady production traffic.

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Scale

$1,300 to spend

$ 1,000 one-time

+30% bonus
$1,000 + $300 free

Best rate per dollar for high-volume workloads.

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FAQ

Simple answers for developers using the API.

Pricing & Balance

Every API endpoint has a fixed price in USD. Your requests are charged directly against your API balance, so you always know what each call costs.

No. Seonio does not use abstract credits for API pricing. You add dollars to your account and spend that balance directly on API usage.

No. Your API balance never expires, so you can use it whenever your workflows need it.

Paid API requests stop until you add more balance. This keeps spend predictable and prevents unexpected charges.

API & Integration

You can create and manage API keys from your account. Use your key to authenticate requests from your app, scripts, or internal tools.

Yes. Your dashboard shows your API usage and remaining balance, so you can track costs while building and running automated workflows.

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Our support team responds to email inquiries within 1 business day. We can help with account, billing, and API integration questions.

We enforce a global rate limit per API-Key of 10 requests per second across all endpoints to ensure system stability. If you exceed this, our servers will return an HTTP 429 Too Many Requests status code. To handle this seamlessly in production, we recommend building rate-limiting logic or an exponential backoff (briefly pausing before retrying) directly into your application code.

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