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

import requests

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

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/campaigns', 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/campaigns")

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/campaigns",
  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": "cam_4HrZbi8xsez4QlrnL",
    "name": "Product Launch Campaign",
    "labels": [],
    "createdAt": "2025-02-20T14:45:54.230Z",
    "createdBy": "usr_zdTCrNFyXblc4mrYK",
    "status": "running",
    "hasError": true,
    "errors": [
      "Your campaign does not have sender."
    ]
  },
  {
    "_id": "cam_k3gu2sa4KIfhRK34M",
    "name": "Sales Outreach 2025",
    "labels": [],
    "createdAt": "2025-02-05T09:00:07.541Z",
    "createdBy": "usr_UEvrOEP0CTAYEoFR4",
    "status": "running",
    "hasError": true,
    "errors": [
      "One of your sender has no email provider.",
      "Your campaign have an invalid sender mailbox"
    ]
  },
  {
    "_id": "cam_HcFmYEhnCI39Pscan",
    "name": "CRM Integration Test",
    "labels": [
      "CRM"
    ],
    "createdAt": "2023-01-27T14:58:52.482Z",
    "createdBy": "usr_i52PiQtbq8SucjVTM",
    "status": "running",
    "hasError": true,
    "errors": [
      "One of your sender has no email provider.",
      "Your campaign have an invalid sender mailbox"
    ]
  },
  {
    "_id": "cam_yZXeC6q3SXs3ha1FI",
    "name": "Customer Onboarding",
    "labels": [],
    "createdAt": "2022-06-14T13:32:57.880Z",
    "createdBy": "usr_i52PiQtbq8SucjVTM",
    "status": "running"
  }
]

"No API key provided"

"The authentication you supplied is incorrect"

"User linked to this API key is blocked"

"No user found for this API key"