Base end point

curl --location --request GET 'https://sandbox.nucleusis.io/api/' \
--header 'Authorization: Bearer {{API-KEY}}'

const myHeaders = new Headers();
myHeaders.append("Authorization", "Bearer {{API-KEY}}");

const requestOptions = {
  method: 'GET',
  headers: myHeaders,
  redirect: 'follow'
};

fetch("https://sandbox.nucleusis.io/api/", requestOptions)
  .then(response => response.json())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://sandbox.nucleusis.io/api/',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'GET',
  CURLOPT_HTTPHEADER => array(
    'Authorization: Bearer {{API-KEY}}'
  ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;