Company to URL API

API Credit Usage

You need to login or signup to use the BuiltWith API. After logging in your actual API key will be shown here.

Introduction

Get domain names from lists of company names you supply to us.

The general access method is as follows -
https://api.builtwith.com/ctu3/api.[xml|json]?KEY=00000000-0000-0000-0000-000000000000&COMPANY=[Company Name (CSV)]

Authentication

You must provide your API key in each lookup. Our endpoints are HTTPS only, providing key encryption. Never expose your API key.

Your API Key is
00000000-0000-0000-0000-000000000000

Get Domain Company Name Example

XML Get Domain Company
https://api.builtwith.com/ctu3/api.xml?KEY=00000000-0000-0000-0000-000000000000&COMPANY=hotelscombined

JSON Get Domain Company
https://api.builtwith.com/ctu3/api.json?KEY=00000000-0000-0000-0000-000000000000&COMPANY=builtwith

JSON Get Multiple Companies
https://api.builtwith.com/ctu3/api.json?KEY=00000000-0000-0000-0000-000000000000&COMPANY=builtwith,hotelscombined

Reference
Parameters
The following GET parameters can be supplied for lookups
NameExamplesRequired
KEY00000000-0000-0000-0000-000000000000
This is your key, use this for lookups.
Yes
COMPANYShell
Atmos%20Energy
Company name URL encoded.
Yes
Responses
Format: Companies[Company]
Company
Company are the websites we think the company is related to.
NameExampleDescription
Domainhotelscombined.comThe domain we think the company name is related to.
CompanyNameHotels Combined Pty LtdThe company name record we have for the domain.
Spend2000The technology spend brack for the domain in USD per month estimated.
BuiltWithRank7605The BuiltWith Top Site rank for the domain (lower is better).
PageRank71250The page rank for the website (lower is better) - 1 to 278 million.
CountryAUThe country of the domain if we've found an address.
StateNSWThe state of the domain if we've found an address.
Postcode2007The postcode/zip of the domain if we've found an address.
CityUltimoThe city of the domain if we've found an address.
Socials (array)https://x.com/hotelscombinedArray of social links for the domain.

Results are ordered by the most premium result - which is generally the most relevant domain for the company name.

Code Examples

Here are implementation examples in different programming languages for making API requests:

var client = new HttpClient();
var request = new HttpRequestMessage
{
    Method = HttpMethod.Get,
    RequestUri = new Uri("https://api.builtwith.com/ctu3/api.json" +
                        "?KEY=00000000-0000-0000-0000-000000000000&COMPANY=Wayfair"),
};
using (var response = await client.SendAsync(request))
{
    response.EnsureSuccessStatusCode();
    var body = await response.Content.ReadAsStringAsync();
    Console.WriteLine(body);
}
import requests
url = "https://api.builtwith.com/ctu3/api.json"
params = {
    'KEY': '00000000-0000-0000-0000-000000000000',
    'COMPANY': 'Wayfair'
}
response = requests.get(url, params=params)
print(response.json())
<?php
$url = "https://api.builtwith.com/ctu3/api.json";
$params = array(
    'KEY' => '00000000-0000-0000-0000-000000000000',
    'COMPANY' => 'Wayfair'
);
$url_with_params = $url . '?' . http_build_query($params);
$response = file_get_contents($url_with_params);
$data = json_decode($response, true);
print_r($data);
?>
const https = require('https');
const url = 'https://api.builtwith.com/ctu3/api.json?KEY=00000000-0000-0000-0000-000000000000&COMPANY=Wayfair';
https.get(url, (res) => {
    let data = '';
    res.on('data', (chunk) => {
        data += chunk;
    });
    res.on('end', () => {
        console.log(JSON.parse(data));
    });
}).on('error', (err) => {
    console.log('Error: ' + err.message);
});
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class BuiltWithAPI {
    public static void main(String[] args) throws Exception {
        String url = "https://api.builtwith.com/ctu3/api.json" +
                    "?KEY=00000000-0000-0000-0000-000000000000&COMPANY=Wayfair";
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("GET");
        BufferedReader in = new BufferedReader(
            new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        System.out.println(response.toString());
    }
}
require 'net/http'
require 'uri'
require 'json'
uri = URI('https://api.builtwith.com/ctu3/api.json')
uri.query = URI.encode_www_form({
    'KEY' => '00000000-0000-0000-0000-000000000000',
    'COMPANY' => 'Wayfair'
})
response = Net::HTTP.get_response(uri)
data = JSON.parse(response.body)
puts data
package main
import (
    "fmt"
    "io/ioutil"
    "net/http"
)
func main() {
    url := "https://api.builtwith.com/ctu3/api.json?KEY=00000000-0000-0000-0000-000000000000&COMPANY=Wayfair"
    resp, err := http.Get(url)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        panic(err)
    }
    fmt.Println(string(body))
}
curl -X GET "https://api.builtwith.com/ctu3/api.json?KEY=00000000-0000-0000-0000-000000000000&COMPANY=Wayfair"
Special Domains

We maintain two lists of use for you when looking up domains. Ignore lists and BuiltWith Suffix lists.

Ignore List
This is our own internal list of domains we do not index. They are either blocked, contains too many misleading technologies or too many subdomains with user generated content.

BuiltWith Suffix List
This is based on the Public Suffix List but includes many additional entries for companies with subdomains that should be considered top level domains. This list provides us with better visibility for internal websites for example it brings northernbeaches.nsw.gov.au to the top level over nsw.gov.au.

Ignore Domains (XML, JSON or TXT)
https://api.builtwith.com/ignoresv1/api.json
Suffix Domains (XML, JSON or TXT)
https://api.builtwith.com/suffixv1/api.json
Error Codes

Note error messages in this format cannot be guaranteed, your implementation should also consider non-200 response codes as errors. The Lookup property will be null (json) or not provided (xml) if the error is server related. View all potential well-formed error codes.

Terms of Use

Our standard terms cover the use all of our APIs.

In general, you can use the API to enhance your product in many ways. The only limitation is you cannot resell the data as-is or provide duplicate functionality to builtwith.com and its associated services.