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

import requests

url = "https://api.lemlist.com/api/companies/{companyId}"

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/{companyId}', 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/{companyId}")

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/{companyId}",
  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;
}

{
  "_id": "cpn_A1B2C3D4E5F6G7H8I",
  "teamId": "tea_8QvkOiBfPdb2ZRhHi",
  "domain": "acme.com",
  "linkedinUrl": "https://www.linkedin.com/company/acme",
  "fields": {
    "name": "Acme Corp",
    "industry": "Technology",
    "location": "San Francisco, CA"
  },
  "ownerId": "usr_ahfFktBBHUIxbVG5P",
  "source": "api",
  "createdAt": "2025-10-28T00:40:37.917Z",
  "createdBy": "usr_ahfFktBBHUIxbVG5P",
  "fieldRejections": [],
  "crmSync": {
    "provider": "hubspot",
    "crmRecordId": "12345678901",
    "syncDisabled": false,
    "errors": []
  }
}

{
  "success": false,
  "error": {
    "code": "INVALID_COMPANY_ID",
    "message": "Invalid companyId format"
  }
}

The authentication you supplied is incorrect

{
  "success": false,
  "error": {
    "code": "COMPANY_NOT_FOUND_BY_ID",
    "message": "No company found with id"
  }
}