Get Site Strength

Get the Site Strength of a domain: a 0–100 score of how strongly the web links to it, from the Rankfield web graph.

GEThttps://rankfield.dev/v1/domains/{domain}/site-strength

curl 'https://rankfield.dev/v1/domains/wikipedia.org/site-strength' \
  -H 'Authorization: Bearer YOUR_API_KEY'

import requests

response = requests.get(
    "https://rankfield.dev/v1/domains/wikipedia.org/site-strength",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
)
print(response.json())

const response = await fetch("https://rankfield.dev/v1/domains/wikipedia.org/site-strength", {
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
  },
});
console.log(await response.json());

{
  "domain": "wikipedia.org",
  "siteStrength": 100
}

{
  "domain": "example-not-in-graph.dev",
  "inGraph": false,
  "siteStrength": 0
}

{
  "error": {
    "message": "Invalid domain"
  }
}

{
  "error": {
    "message": "A valid API key is required"
  }
}

Parameters

Headers

Name	Type	Required	Default	Description
`Authorization`	string	Yes	–	`Bearer` followed by your API key. See Authentication.

Path parameters

Name	Type	Required	Default	Description
`domain`	string	Yes	–	The domain, such as `example.com`. Case is ignored, a leading `www.` is removed, and a full URL is read as its host. URL-encode it in the path.

Response

Field	Type	Description
`domain`	string	The domain as it was looked up, after normalising.
`inGraph`	boolean	Only when the domain isn't in our link graph yet: `false`, with zeros. Absent otherwise.
`siteStrength`	integer	0–100. Higher means stronger link evidence in the graph.

The score is Rankfield's own. It is not Moz Domain Authority or Ahrefs Domain Rating, and it does not estimate traffic. How Site Strength works explains how it is calculated.

Errors

Status	When
400	The domain is not a valid domain name, or a parameter is out of range.
401	No valid API key.
429	Too many requests at once; wait for `Retry-After`.
502	The graph lookup behind the API failed. Retry later.
503	The graph index is unavailable for a moment. Retry after `Retry-After`.

Limits

No per-key limits. When the server is busy you get 429 with Retry-After.

Get Referring Domains: how many domains link to this one, with the 20 strongest.
Get Referrer Profile: the Site Strength of every referring domain, in ten ranges.

MCP

On the MCP server, the tool for this is get_site_strength.