using System.Net.Http.Headers;
var client = new HttpClient();
var request = new HttpRequestMessage
{
    Method = HttpMethod.Get,
    RequestUri = new Uri("https://virkdata.dk/api/?search=tdc net"),
    Headers =
    {
        { "Authentication", "YOUR_API_KEY" },
    },
};
using (var response = await client.SendAsync(request))
{
    response.EnsureSuccessStatusCode();
    var body = await response.Content.ReadAsStringAsync();
    Console.WriteLine(body);
}

$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_URL => "https://virkdata.dk/api/?search=tdc net",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => "",
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 30,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "GET",
    CURLOPT_HTTPHEADER => [
        "Authorization: YOUR_API_KEY"
    ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
    echo "cURL Error #:" . $err;
} else {
    echo $response;
}

const http = require('https');

const options = {
    method: 'GET',
    hostname: 'https://virkdata.dk/api/',
    port: null,
    path: '?search=tdc net',
    headers: {
        Authentication: 'YOUR_API_KEY'
    }
};

const req = http.request(options, function (res) {
    const chunks = [];

    res.on('data', function (chunk) {
        chunks.push(chunk);
    });

    res.on('end', function () {
        const body = Buffer.concat(chunks);
        console.log(body.toString());
    });
});

req.end();

const settings = {
    async: true,
    crossDomain: true,
    url: 'https://virkdata.dk/api/?search=tdc net',
    method: 'GET',
    headers: {
        Authentication: 'YOUR_API_KEY'
    }
};

$.ajax(settings).done(function (response) {
    console.log(response);
});

AsyncHttpClient client = new DefaultAsyncHttpClient();
client.prepare("GET", "https://virkdata.dk/api/?search=tdc net")
    .setHeader("Authentication", "YOUR_API_KEY")
    .execute()
    .toCompletableFuture()
    .thenAccept(System.out::println)
    .join();

client.close();

HttpResponse<String> response = Unirest.get("https://virkdata.dk/api/?search=tdc net")
.header("Authentication", "YOUR_API_KEY")
.asString();

import http.client

conn = http.client.HTTPSConnection("https://virkdata.dk/api/")

headers = {
    'Authentication': "YOUR_API_KEY"
}

conn.request("GET", "?search=tdc net", headers=headers)

res = conn.getresponse()
data = res.read()

print(data.decode("utf-8"))

library(httr)

url <- "https://virkdata.dk/api/"

queryString <- list(search = "tdc net")

response <- VERB("GET", url, query = queryString, add_headers('Authentication' = 'YOUR_API_KEY'), content_type("application/octet-stream"))

content(response, "text")

require 'uri'
require 'net/http'

url = URI("https://virkdata.dk/api/?search=tdc net")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authentication"] = 'YOUR_API_KEY'

response = http.request(request)
puts response.read_body

{
"vat": 40075267,
"name": "TDC NET A/S",
"address": "Teglholmsgade 1",
"zipcode": 2450,
"city": "København SV",
"protected": false,
"phone": null,
"email": null,
"website": null,
"fax": null,
"startdate": "2019-12-03",
"enddate": null,
"employees": 2328,
"industrycodemain": 611000,
"industrydescmain": "Fastnetbaseret telekommunikation",
"companytype": "A/S",
"companydesc": "Aktieselskab",
"owners": [
    "Ole Mølgaard Andersen",
    "Nikolaj Wilhjelm Galskjøt",
    "Henrik Nørgaard Brandt",
    "Bastian Rankløve",
    "Lars Hougaard",
    "Henrik Clausen",
    "Frank Hyldmar",
    "Flemming Nørholm Nielsen",
    "Steen Møller",
    "Jens Aaløse",
    "Susanne Juhl",
    "Peter Tind Larsen",
    "Ulrik Laudrup Bølling",
    "Andreas Albert Pfisterer",
    "Lasse Rudebeck Pilgaard",
    "Marie Malmstedt-Miller",
    "Laura Frovin Frederiksen",
    "Allison Kirkby",
    "Martin Dollaris Præstegaard",
    "Casper Niclas Bøgelund Moser",
    "Svend Bank Andreasen",
    "Søren Kalmeyer",
    "Lars Schmidt Lindholm",
    "Kurt Preben Nielsen",
    "Morten Nordsmark Pedersen",
    "Martin Crone",
    "Michel Daniel Roger Jumeau",
    "Pernille Bloch",
    "Helle Schultz",
    "Mathilde Marie Fonager",
    "TELEDANMARK A/S",
    "DELOITTE STATSAUTORISERET REVISIONSPARTNERSELSKAB",
    "PRICEWATERHOUSECOOPERS STATSAUTORISERET REVISIONSPARTNERSELSKAB",
    "Aktieselskabet af 29. november 2021",
    "Nathan Andrew Luckey",
    "Michael Parton",
    "Geoffrey David Shakespeare",
    "Gabriela Alejandra Styf Sjöman",
    "Natalia Axt"
]

<?xml version="1.0" encoding="UTF-8"?>
<company xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <vat>40075267</vat>
    <name>TDC NET A/S</name>
    <address>Teglholmsgade 1</address>
    <zipcode>2450</zipcode>
    <city>København SV</city>
    <protected/>
    <phone xsi:nil="true"/>
    <email xsi:nil="true"/>
    <website xsi:nil="true"/>
    <fax xsi:nil="true"/>
    <startdate>2019-12-03</startdate>
    <enddate xsi:nil="true"/>
    <employees>2328</employees>
    <industrycodemain>611000</industrycodemain>
    <industrydescmain>Fastnetbaseret telekommunikation</industrydescmain>
    <companytype>A/S</companytype>
    <companydesc>Aktieselskab</companydesc>
    <owners>
        <owner>Ole Mølgaard Andersen</owner>
        <owner>Nikolaj Wilhjelm Galskjøt</owner>
        <owner>Henrik Nørgaard Brandt</owner>
        <owner>Bastian Rankløve</owner>
        <owner>Lars Hougaard</owner>
        <owner>Henrik Clausen</owner>
        <owner>Frank Hyldmar</owner>
        <owner>Flemming Nørholm Nielsen</owner>
        <owner>Steen Møller</owner>
        <owner>Jens Aaløse</owner>
        <owner>Susanne Juhl</owner>
        <owner>Peter Tind Larsen</owner>
        <owner>Ulrik Laudrup Bølling</owner>
        <owner>Andreas Albert Pfisterer</owner>
        <owner>Lasse Rudebeck Pilgaard</owner>
        <owner>Marie Malmstedt-Miller</owner>
        <owner>Laura Frovin Frederiksen</owner>
        <owner>Allison Kirkby</owner>
        <owner>Martin Dollaris Præstegaard</owner>
        <owner>Casper Niclas Bøgelund Moser</owner>
        <owner>Svend Bank Andreasen</owner>
        <owner>Søren Kalmeyer</owner>
        <owner>Lars Schmidt Lindholm</owner>
        <owner>Kurt Preben Nielsen</owner>
        <owner>Morten Nordsmark Pedersen</owner>
        <owner>Martin Crone</owner>
        <owner>Michel Daniel Roger Jumeau</owner>
        <owner>Pernille Bloch</owner>
        <owner>Helle Schultz</owner>
        <owner>Mathilde Marie Fonager</owner>
        <owner>TELEDANMARK A/S</owner>
        <owner>DELOITTE STATSAUTORISERET REVISIONSPARTNERSELSKAB</owner>
        <owner>PRICEWATERHOUSECOOPERS STATSAUTORISERET REVISIONSPARTNERSELSKAB</owner>
        <owner>Aktieselskabet af 29. november 2021</owner>
        <owner>Nathan Andrew Luckey</owner>
        <owner>Michael Parton</owner>
        <owner>Geoffrey David Shakespeare</owner>
        <owner>Gabriela Alejandra Styf Sjöman</owner>
        <owner>Natalia Axt</owner>
        <owner/>
    </owners>
</company>

vat: 40075267
name: TDC NET A/S
address: Teglholmsgade 1
zipcode: 2450
city: København SV
protected: 
phone: null
email: null
website: null
fax: null
startdate: 2019-12-03
enddate: null
employees: 2328
industrycodemain: 611000
industrydescmain: Fastnetbaseret telekommunikation
companytype: A/S
companydesc: Aktieselskab
owners: Ole Mølgaard Andersen, Nikolaj Wilhjelm Galskjøt, Henrik Nørgaard Brandt, Bastian Rankløve, Lars Hougaard, Henrik Clausen, Frank Hyldmar, Flemming Nørholm Nielsen, Steen Møller, Jens Aaløse, Susanne Juhl, Peter Tind Larsen, Ulrik Laudrup Bølling, Andreas Albert Pfisterer, Lasse Rudebeck Pilgaard, Marie Malmstedt-Miller, Laura Frovin Frederiksen, Allison Kirkby, Martin Dollaris Præstegaard, Casper Niclas Bøgelund Moser, Svend Bank Andreasen, Søren Kalmeyer, Lars Schmidt Lindholm, Kurt Preben Nielsen, Morten Nordsmark Pedersen, Martin Crone, Michel Daniel Roger Jumeau, Pernille Bloch, Helle Schultz, Mathilde Marie Fonager, TELEDANMARK A/S, DELOITTE STATSAUTORISERET REVISIONSPARTNERSELSKAB, PRICEWATERHOUSECOOPERS STATSAUTORISERET REVISIONSPARTNERSELSKAB, Aktieselskabet af 29. november 2021, Nathan Andrew Luckey, Michael Parton, Geoffrey David Shakespeare, Gabriela Alejandra Styf Sjöman, Natalia Axt, 

<!DOCTYPE html>
<html lang='en'>
<head>
<meta charset='UTF-8'>
<meta name='viewport' content='width=device-width, initial-scale=1.0'>
<title>API Response</title>
</head>
<body>
<table border='1'>
<tr><td>vat</td><td>40075267</td></tr>
<tr><td>name</td><td>TDC NET A/S</td></tr>
<tr><td>address</td><td>Teglholmsgade 1</td></tr>
<tr><td>zipcode</td><td>2450</td></tr>
<tr><td>city</td><td>København SV</td></tr>
<tr><td>protected</td><td></td></tr>
<tr><td>phone</td><td>null</td></tr>
<tr><td>email</td><td>null</td></tr>
<tr><td>website</td><td>null</td></tr>
<tr><td>fax</td><td>null</td></tr>
<tr><td>startdate</td><td>2019-12-03</td></tr>
<tr><td>enddate</td><td>null</td></tr>
<tr><td>employees</td><td>2328</td></tr>
<tr><td>industrycodemain</td><td>611000</td></tr>
<tr><td>industrydescmain</td><td>Fastnetbaseret telekommunikation</td></tr>
<tr><td>companytype</td><td>A/S</td></tr>
<tr><td>companydesc</td><td>Aktieselskab</td></tr>
<tr><td>owners</td><td>Ole Mølgaard Andersen, Nikolaj Wilhjelm Galskjøt, Henrik Nørgaard Brandt, Bastian Rankløve, Lars Hougaard, Henrik Clausen, Frank Hyldmar, Flemming Nørholm Nielsen, Steen Møller, Jens Aaløse, Susanne Juhl, Peter Tind Larsen, Ulrik Laudrup Bølling, Andreas Albert Pfisterer, Lasse Rudebeck Pilgaard, Marie Malmstedt-Miller, Laura Frovin Frederiksen, Allison Kirkby, Martin Dollaris Præstegaard, Casper Niclas Bøgelund Moser, Svend Bank Andreasen, Søren Kalmeyer, Lars Schmidt Lindholm, Kurt Preben Nielsen, Morten Nordsmark Pedersen, Martin Crone, Michel Daniel Roger Jumeau, Pernille Bloch, Helle Schultz, Mathilde Marie Fonager, TELEDANMARK A/S, DELOITTE STATSAUTORISERET REVISIONSPARTNERSELSKAB, PRICEWATERHOUSECOOPERS STATSAUTORISERET REVISIONSPARTNERSELSKAB, Aktieselskabet af 29. november 2021, Nathan Andrew Luckey, Michael Parton, Geoffrey David Shakespeare, Gabriela Alejandra Styf Sjöman, Natalia Axt, </td></tr>
</table>
</body>
</html>

{"vat":40075267,"name":"TDC NET A\/S","address":"Teglholmsgade 1","zipcode":2450,"city":"K\u00f8benhavn SV","protected":false,"phone":null,"email":null,"website":null,"fax":null,"startdate":"2019-12-03","enddate":null,"employees":2328,"industrycodemain":611000,"industrydescmain":"Fastnetbaseret telekommunikation","companytype":"A\/S","companydesc":"Aktieselskab","owners":["Ole M\u00f8lgaard Andersen","Nikolaj Wilhjelm Galskj\u00f8t","Henrik N\u00f8rgaard Brandt","Bastian Rankl\u00f8ve","Lars Hougaard","Henrik Clausen","Frank Hyldmar","Flemming N\u00f8rholm Nielsen","Steen M\u00f8ller","Jens Aal\u00f8se","Susanne Juhl","Peter Tind Larsen","Ulrik Laudrup B\u00f8lling","Andreas Albert Pfisterer","Lasse Rudebeck Pilgaard","Marie Malmstedt-Miller","Laura Frovin Frederiksen","Allison Kirkby","Martin Dollaris Pr\u00e6stegaard","Casper Niclas B\u00f8gelund Moser","Svend Bank Andreasen","S\u00f8ren Kalmeyer","Lars Schmidt Lindholm","Kurt Preben Nielsen","Morten Nordsmark Pedersen","Martin Crone","Michel Daniel Roger Jumeau","Pernille Bloch","Helle Schultz","Mathilde Marie Fonager","TELEDANMARK A\/S","DELOITTE STATSAUTORISERET REVISIONSPARTNERSELSKAB","PRICEWATERHOUSECOOPERS STATSAUTORISERET REVISIONSPARTNERSELSKAB","Aktieselskabet af 29. november 2021","Nathan Andrew Luckey","Michael Parton","Geoffrey David Shakespeare","Gabriela Alejandra Styf Sj\u00f6man","Natalia Axt",null]}