curl --request GET \
  --url https://api-m.sandbox.paypal.com/v1/commerce/billing/subscriptions \
  --header 'Authorization: Bearer <token>'

{
  "subscriptions": [
    {
      "external_customer_id": "5eb02857-a71e-4ea2-bcf9-57d3a41bc6b13234",
      "external_id": "Subscription_1233",
      "plan_code": "Plan-Code-12345",
      "billing_time": "CALENDAR",
      "status": "ACTIVE",
      "start_date": "2025-06-27T20:44:21Z",
      "created_at": "2025-07-30T01:54:40Z",
      "current_period_start": "2025-07-01T00:00:00Z",
      "current_period_end": "2025-07-31T23:59:59Z",
      "id": "d9e9d0c0-d672-4299-8b8e-9d20ca20f465"
    },
    {
      "external_customer_id": "5eb02857-a71e-4ea2-bcf9-1751410090",
      "external_id": "Subscription_123353453453535-2025-07-01T22",
      "plan_code": "Plan-Code-2222",
      "billing_time": "CALENDAR",
      "status": "ACTIVE",
      "start_date": "2025-07-01T22:48:37Z",
      "created_at": "2025-07-30T01:54:40Z",
      "current_period_start": "2025-07-01T22:48:37Z",
      "current_period_end": "2025-07-31T23:59:59Z",
      "id": "35a75733-5940-42cc-97ed-1587d2d364e1"
    }
  ],
  "metadata": {
    "total_count": 24,
    "total_pages": 3,
    "current_page": 1
  }
}

{
  "name": "NOT_AUTHORIZED",
  "message": "Authorization failed due to insufficient permissions.",
  "debug_id": "565f78f101498",
  "details": [
    {
      "issue": "PERMISSION_DENIED",
      "description": "You do not have permission to access or perform operations on this resource."
    }
  ]
}

{
  "name": "<string>",
  "debug_id": "<string>",
  "message": "<string>",
  "details": [
    {
      "field": "<string>",
      "value": "<string>",
      "location": "<string>",
      "issue": "<string>",
      "description": "<string>"
    }
  ]
}

{
  "name": "INTERNAL_SERVER_ERROR",
  "message": "An internal server error has occurred.",
  "debug_id": "90957fca61718"
}