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

fetch('http://{defaultHost}/api/v2/platform/webhooks/subscribers/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request GET \
  --url http://{defaultHost}/api/v2/platform/webhooks/subscribers/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "10",
    "type": "subscriber",
    "attributes": {
      "url": "https://www.url10.com/",
      "active": true,
      "subscriptions": [
        "*"
      ],
      "created_at": "2022-11-08T19:35:59.604Z",
      "updated_at": "2022-11-08T19:35:59.604Z"
    }
  }
}

{
  "error": "The access token is invalid"
}

{
  "error": "The resource you were looking for could not be found."
}