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

fetch('https://api.paddle.com/notification-settings', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": [
    {
      "id": "ntfset_01gkpjp8bkm3tm53kdgkx6sms7",
      "description": "Slack notifications",
      "type": "url",
      "destination": "https://hooks.slack.com/example",
      "active": true,
      "api_version": 1,
      "include_sensitive_fields": false,
      "traffic_source": "all",
      "subscribed_events": [
        {
          "name": "transaction.billed",
          "description": "Occurs when a transaction is billed.",
          "group": "Transaction",
          "available_versions": [
            1
          ]
        },
        {
          "name": "transaction.canceled",
          "description": "Occurs when a transaction is canceled.",
          "group": "Transaction",
          "available_versions": [
            1
          ]
        },
        {
          "name": "transaction.completed",
          "description": "Occurs when a transaction is completed.",
          "group": "Transaction",
          "available_versions": [
            1
          ]
        },
        {
          "name": "transaction.created",
          "description": "Occurs when a transaction is created.",
          "group": "Transaction",
          "available_versions": [
            1
          ]
        },
        {
          "name": "transaction.payment_failed",
          "description": "Occurs when a payment fails for a transaction.",
          "group": "Transaction",
          "available_versions": [
            1
          ]
        },
        {
          "name": "transaction.ready",
          "description": "Occurs when a transaction is ready.",
          "group": "Transaction",
          "available_versions": [
            1
          ]
        },
        {
          "name": "transaction.updated",
          "description": "Occurs when a transaction is updated.",
          "group": "Transaction",
          "available_versions": [
            1
          ]
        },
        {
          "name": "subscription.activated",
          "description": "Occurs when a subscription is activated.",
          "group": "Subscription",
          "available_versions": [
            1
          ]
        },
        {
          "name": "subscription.canceled",
          "description": "Occurs when a subscription is canceled.",
          "group": "Subscription",
          "available_versions": [
            1
          ]
        },
        {
          "name": "subscription.created",
          "description": "Occurs when a subscription is created.",
          "group": "Subscription",
          "available_versions": [
            1
          ]
        },
        {
          "name": "subscription.past_due",
          "description": "Occurs when a subscription is past due.",
          "group": "Subscription",
          "available_versions": [
            1
          ]
        },
        {
          "name": "subscription.paused",
          "description": "Occurs when a subscription is paused.",
          "group": "Subscription",
          "available_versions": [
            1
          ]
        },
        {
          "name": "subscription.resumed",
          "description": "Occurs when a subscription is resumed.",
          "group": "Subscription",
          "available_versions": [
            1
          ]
        },
        {
          "name": "subscription.trialing",
          "description": "Occurs when a subscription is trialing.",
          "group": "Subscription",
          "available_versions": [
            1
          ]
        },
        {
          "name": "subscription.updated",
          "description": "Occurs when a subscription is updated.",
          "group": "Subscription",
          "available_versions": [
            1
          ]
        }
      ],
      "endpoint_secret_key": "pdl_ntfset_01gkpjp8bkm3tm53kdgkx6sms7_6h3qd3uFSi9YCD3OLYAShQI90XTI5vEI"
    }
  ],
  "meta": {
    "pagination": {
      "per_page": 200,
      "estimated_total": 1,
      "next": "https://api.paddle.com/notification-settings?after=ntfset_01gt21c5pdx9q1e4mh1xrsjjn6",
      "has_more": false
    },
    "request_id": "237fec70-9edb-4d93-90d9-e19ffa8bfe48"
  }
}