curl --request GET \
  --url https://{host}/v1/couriers \
  --header 'Authorization: Bearer <token>'

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://{host}/v1/couriers', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://{host}/v1/couriers",
  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: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

import requests

url = "https://{host}/v1/couriers"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

{
  "data": [
    {
      "type": "couriers",
      "id": "postnl",
      "attributes": {
        "name": "PostNL",
        "trackingNumberPatterns": [
          "^3S[A-Z0-9]{4}[0-9]{5,11}$",
          "^[A-Z]{2}[0-9]{9}NL$"
        ],
        "buildsTrackingUrl": true,
        "trackingUrlTemplate": "https://jouw.postnl.nl/track-and-trace/{number}-{country}-{postcode}",
        "detectionPriority": 5
      }
    },
    {
      "type": "couriers",
      "id": "ups",
      "attributes": {
        "name": "UPS",
        "trackingNumberPatterns": [
          "^1Z[0-9A-Z]{16}$"
        ],
        "buildsTrackingUrl": true,
        "trackingUrlTemplate": "https://www.ups.com/track?tracknum={number}",
        "detectionPriority": 3
      }
    },
    {
      "type": "couriers",
      "id": "other",
      "attributes": {
        "name": "Other",
        "trackingNumberPatterns": [],
        "buildsTrackingUrl": false,
        "trackingUrlTemplate": null,
        "detectionPriority": null
      }
    }
  ],
  "meta": {
    "total": 43
  }
}

{
  "errors": [
    {
      "status": "404",
      "code": "watch_reserved",
      "title": "Not Found",
      "detail": "<string>",
      "meta": {},
      "source": {
        "pointer": "/data/attributes/reference",
        "parameter": "<string>"
      }
    }
  ],
  "jsonapi": {
    "version": "1.0"
  }
}