curl --request GET \
  --url https://api.lemlist.com/api/companies \
  --header 'Authorization: Basic <encoded-value>'

import requests

url = "https://api.lemlist.com/api/companies"

headers = {"Authorization": "Basic <encoded-value>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Basic <encoded-value>'}};

fetch('https://api.lemlist.com/api/companies', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

require 'uri'
require 'net/http'

url = URI("https://api.lemlist.com/api/companies")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Basic <encoded-value>'

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

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.lemlist.com/api/companies",
  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: Basic <encoded-value>"
  ],
]);

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

curl_close($curl);

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

{
  "data": [
    {
      "_id": "cpn_gG7PsmZFpEAnpMCHO",
      "createdAt": "2025-10-26T11:54:27.387Z",
      "createdBy": "usr_iGBmhLaxZmL0s7k1G",
      "domain": "persana.ai",
      "fields": {
        "name": "Persana AI",
        "picture": "https://example.com/logos/company-1.png"
      },
      "ownerId": "usr_iGBmhLaxZmL0s7k1G"
    },
    {
      "_id": "cpn_FEWCjzMWXo5StjpDa",
      "createdAt": "2025-10-26T11:45:18.773Z",
      "createdBy": "usr_iGBmhLaxZmL0s7k1G",
      "domain": "duno.ai",
      "fields": {
        "industry": "IT Services and IT Consulting",
        "name": "Duno.ai",
        "picture": "https://example.com/logos/company-2.png"
      },
      "ownerId": "usr_iGBmhLaxZmL0s7k1G"
    },
    {
      "_id": "cpn_2STz8x5Bexmd0nvIz",
      "createdAt": "2025-10-25T21:37:45.741Z",
      "createdBy": "usr_iGBmhLaxZmL0s7k1G",
      "domain": "tally.so",
      "fields": {
        "industry": "Computer Software",
        "name": "lemlist family",
        "picture": "https://example.com/logos/lemlist.png"
      },
      "ownerId": "usr_iGBmhLaxZmL0s7k1G"
    },
    {
      "_id": "cpn_Qf4CJuUrNUNmHm6uZ",
      "createdAt": "2025-10-24T07:26:34.956Z",
      "createdBy": "usr_ahfFktBBHUIxbVG5P",
      "domain": "example.com",
      "fields": {
        "name": "Growth & GTM Engineering"
      },
      "ownerId": "usr_ahfFktBBHUIxbVG5P"
    }
  ],
  "total": 59310
}

"Bad team"

"The authentication you supplied is incorrect"