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

fetch('https://api.paddle.com/subscriptions/{subscription_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": {
    "id": "sub_01hv8y5ehszzq0yv20ttx3166y",
    "status": "active",
    "customer_id": "ctm_01hv8wt8nffez4p2t6typn4a5j",
    "address_id": "add_01hv8y4jk511j9g2n9a2mexjbx",
    "business_id": null,
    "currency_code": "USD",
    "created_at": "2024-04-12T10:38:00.761Z",
    "updated_at": "2024-04-12T10:38:00.761Z",
    "started_at": "2024-04-12T10:37:59.556997Z",
    "first_billed_at": "2024-04-12T10:37:59.556997Z",
    "next_billed_at": "2024-05-12T10:37:59.556997Z",
    "paused_at": null,
    "canceled_at": null,
    "collection_mode": "automatic",
    "billing_details": null,
    "current_billing_period": {
      "starts_at": "2024-04-12T10:37:59.556997Z",
      "ends_at": "2024-05-12T10:37:59.556997Z"
    },
    "billing_cycle": {
      "frequency": 1,
      "interval": "month"
    },
    "scheduled_change": null,
    "items": [
      {
        "status": "active",
        "quantity": 10,
        "recurring": true,
        "created_at": "2024-04-12T10:38:00.761Z",
        "updated_at": "2024-04-12T10:38:00.761Z",
        "previously_billed_at": "2024-04-12T10:37:59.556997Z",
        "next_billed_at": "2024-05-12T10:37:59.556997Z",
        "trial_dates": null,
        "price": {
          "id": "pri_01gsz8x8sawmvhz1pv30nge1ke",
          "product_id": "pro_01gsz4t5hdjse780zja8vvr7jg",
          "type": "standard",
          "description": "Monthly",
          "name": "Monthly (per seat)",
          "tax_mode": "account_setting",
          "billing_cycle": {
            "frequency": 1,
            "interval": "month"
          },
          "trial_period": null,
          "unit_price": {
            "amount": "3000",
            "currency_code": "USD"
          },
          "unit_price_overrides": [],
          "custom_data": null,
          "status": "active",
          "quantity": {
            "minimum": 1,
            "maximum": 999
          },
          "import_meta": null,
          "created_at": "2023-02-23T13:55:22.538367Z",
          "updated_at": "2024-04-11T13:54:52.254748Z"
        },
        "product": {
          "id": "pro_01gsz4t5hdjse780zja8vvr7jg",
          "name": "AeroEdit Pro",
          "type": "standard",
          "tax_category": "standard",
          "description": "Designed for professional pilots, including all features plus in Basic plus compliance monitoring, route optimization, and third-party integrations.",
          "image_url": "https://paddle.s3.amazonaws.com/user/165798/bT1XUOJAQhOUxGs83cbk_pro.png",
          "custom_data": {
            "features": {
              "aircraft_performance": true,
              "compliance_monitoring": true,
              "flight_log_management": true,
              "payment_by_invoice": false,
              "route_planning": true,
              "sso": false
            },
            "suggested_addons": [
              "pro_01h1vjes1y163xfj1rh1tkfb65",
              "pro_01gsz97mq9pa4fkyy0wqenepkz"
            ],
            "upgrade_description": "Move from Basic to Pro to take advantage of aircraft performance, advanced route planning, and compliance monitoring."
          },
          "status": "active",
          "import_meta": null,
          "created_at": "2023-02-23T12:43:46.605Z",
          "updated_at": "2024-04-05T15:53:44.687Z"
        }
      },
      {
        "status": "active",
        "quantity": 1,
        "recurring": true,
        "created_at": "2024-04-12T10:38:00.761Z",
        "updated_at": "2024-04-12T10:38:00.761Z",
        "previously_billed_at": "2024-04-12T10:37:59.556997Z",
        "next_billed_at": "2024-05-12T10:37:59.556997Z",
        "trial_dates": null,
        "price": {
          "id": "pri_01h1vjfevh5etwq3rb416a23h2",
          "product_id": "pro_01h1vjes1y163xfj1rh1tkfb65",
          "type": "standard",
          "description": "Monthly",
          "name": "Monthly (recurring addon)",
          "tax_mode": "account_setting",
          "billing_cycle": {
            "frequency": 1,
            "interval": "month"
          },
          "trial_period": null,
          "unit_price": {
            "amount": "10000",
            "currency_code": "USD"
          },
          "unit_price_overrides": [],
          "custom_data": null,
          "status": "active",
          "quantity": {
            "minimum": 1,
            "maximum": 100
          },
          "import_meta": null,
          "created_at": "2023-06-01T13:31:12.625056Z",
          "updated_at": "2024-04-09T07:23:00.907834Z"
        },
        "product": {
          "id": "pro_01h1vjes1y163xfj1rh1tkfb65",
          "name": "Analytics addon",
          "type": "standard",
          "tax_category": "standard",
          "description": "Unlock advanced insights into your flight data with enhanced analytics and reporting features. Includes customizable reporting templates and trend analysis across flights.",
          "image_url": "https://paddle.s3.amazonaws.com/user/165798/97dRpA6SXzcE6ekK9CAr_analytics.png",
          "custom_data": null,
          "status": "active",
          "import_meta": null,
          "created_at": "2023-06-01T13:30:50.302Z",
          "updated_at": "2024-04-05T15:47:17.163Z"
        }
      }
    ],
    "custom_data": null,
    "management_urls": {
      "update_payment_method": "https://buyer-portal.paddle.com/subscriptions/sub_01hv8y5ehszzq0yv20ttx3166y/update-payment-method",
      "cancel": "https://buyer-portal.paddle.com/subscriptions/sub_01hv8y5ehszzq0yv20ttx3166y/cancel"
    },
    "discount": null,
    "import_meta": null
  },
  "meta": {
    "request_id": "e9ce8070-295a-4c8b-9180-7ab58dc31072"
  }
}