Find domains whose backlinks overlap a target's

POST/v1/tools/web.backlinks.competitors/callsNeeds an API key

Returns the domains whose backlinks overlap a target's, with how many linking domains they share. Use it to find link-building competitors.

Tool web.backlinks.competitors on Open web and SEO. Contract version 1, released 2026-10-27.

Over REST, send the input in the body. Over MCP, pass the same input to call_tool.

Both return the full response: the call's ID, status and cost, with this tool's result in output.

Input

targetstringRequired

The domain or subdomain, without scheme or www, such as "moz.com", or the full URL of one page.

1 or more characters.

pageinteger· default 1

Page of results, page_size per page. Domains come by shared_linking_domain_count, highest first.

At least 1.

page_sizeinteger· default 10

Results per page. Each result adds to the price of the call.

From 1 to 100.

Output

A successful call returns these blocks in its output. A field not marked required can be null.

`results`

A list of rows. Always present, possibly empty.

domainstringRequired

A domain whose backlinks overlap the target's.

domain_rankinteger

Authority of the domain from its own backlinks, from 0 to 100. Each provider computes its own; scores of different providers do not compare.

shared_linking_domain_countinteger

Domains that link to both this domain and the target.

linking_domain_countinteger

Domains that link to this domain.

curl https://api.voxoria.ai/v1/tools/web.backlinks.competitors/calls \
  -H "Authorization: Bearer $VOXORIA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"input":{"target":"moz.com"}}'

import os

import httpx

response = httpx.post(
    "https://api.voxoria.ai/v1/tools/web.backlinks.competitors/calls",
    headers={"Authorization": f"Bearer {os.environ['VOXORIA_API_KEY']}"},
    json={"input": {"target": "moz.com"}},
    timeout=60,
)
print(response.json())

const response = await fetch("https://api.voxoria.ai/v1/tools/web.backlinks.competitors/calls", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.VOXORIA_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"input": {"target": "moz.com"}}),
});
console.log(await response.json());

{
  "name": "call_tool",
  "arguments": {
    "tool": "web.backlinks.competitors",
    "input": {
      "target": "moz.com"
    }
  }
}

200 OKoutputapplication/json

{
  "results": [
    {
      "domain": "ahrefs.com",
      "domain_rank": 60,
      "shared_linking_domain_count": 4921,
      "linking_domain_count": null
    },
    {
      "domain": "semrush.com",
      "domain_rank": 56,
      "shared_linking_domain_count": 4207,
      "linking_domain_count": null
    },
    {
      "domain": "hubspot.com",
      "domain_rank": 50,
      "shared_linking_domain_count": 2320,
      "linking_domain_count": null
    }
  ]
}

The output of a real call, each list cut to 3 items.