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

import requests

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

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/schedules', 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/schedules")

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/schedules",
  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;
}

{
  "schedules": [
    {
      "_id": "skd_iQiNG7VinWIUkgLy1",
      "name": "Custom Schedule",
      "secondsToWait": 1200,
      "timezone": "Europe/Paris",
      "start": "09:00",
      "end": "18:00",
      "weekdays": [
        1,
        2,
        3,
        4
      ],
      "public": true,
      "teamId": "tea_8QvkOiBfPdb2ZRhHi",
      "createdBy": "usr_ahfFktBBHUIxbVG5P",
      "createdAt": "2025-10-27T09:41:11.187Z"
    },
    {
      "_id": "skd_u6cfmo0a7pgwfup9i",
      "name": "Default schedule",
      "secondsToWait": 1200,
      "timezone": "Europe/Paris",
      "start": "09:00",
      "end": "18:00",
      "weekdays": [
        1,
        2,
        3,
        4,
        5
      ],
      "teamId": "tea_8QvkOiBfPdb2ZRhHi",
      "createdBy": "usr_ahfFktBBHUIxbVG5P",
      "createdAt": "2025-10-27T07:01:04.041Z"
    },
    {
      "_id": "skd_nNGfP0HEkRYJLW4qA",
      "name": "Default schedule",
      "secondsToWait": 1200,
      "timezone": "Asia/Seoul",
      "start": "09:00",
      "end": "18:00",
      "weekdays": [
        1,
        2,
        3,
        4,
        5
      ],
      "teamId": "tea_8QvkOiBfPdb2ZRhHi",
      "createdBy": "usr_ahfFktBBHUIxbVG5P",
      "createdAt": "2025-10-24T09:37:25.040Z"
    },
    {
      "_id": "skd_kgykTULiqy42doHxY",
      "name": "Default schedule",
      "secondsToWait": 1200,
      "timezone": "Asia/Seoul",
      "start": "09:00",
      "end": "18:00",
      "weekdays": [
        1,
        2,
        3,
        4,
        5
      ],
      "teamId": "tea_8QvkOiBfPdb2ZRhHi",
      "createdBy": "usr_ahfFktBBHUIxbVG5P",
      "createdAt": "2025-10-24T07:24:44.785Z"
    },
    {
      "_id": "skd_SvcCMF1LTI3mgzmCW",
      "name": "Default schedule",
      "secondsToWait": 1200,
      "timezone": "Europe/Sofia",
      "start": "09:00",
      "end": "18:00",
      "weekdays": [
        1,
        2,
        3,
        4,
        5
      ],
      "teamId": "tea_8QvkOiBfPdb2ZRhHi",
      "createdBy": "usr_46he8cjrZ7s0IQi53",
      "createdAt": "2025-10-20T13:13:34.680Z"
    }
  ],
  "pagination": {
    "totalRecords": 3039,
    "currentPage": 1,
    "nextPage": 2,
    "totalPage": 608
  }
}

Bad team

The authentication you supplied is incorrect