curl --request GET \
  --url https://sandbox-payment-b2b.singapay.id/api/v2.0/recurring/plans/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'X-PARTNER-ID: <api-key>'

{
  "response_code": "SP000",
  "response_message": "Successfully",
  "data": {
    "id": "9f8b6c2e-1a2b-4c3d-8e4f-5a6b7c8d9e0f",
    "name": "Monthly Pro Subscription",
    "amount": "150000",
    "currency": "IDR",
    "created_at": "2026-06-09T10:00:00+07:00",
    "schedule": {
      "interval": 1,
      "interval_unit": "month",
      "current_interval": 1,
      "total_interval": 12,
      "start_time": "2026-07-01T00:00:00+07:00",
      "previous_payment_at": null,
      "next_payment_at": "2026-07-01T00:00:00+07:00"
    },
    "status": "active",
    "payment_type": "credit_card",
    "retry_policy": {
      "max_attempts": 3,
      "interval_days": 1,
      "failed_payment_action": "continue_plan"
    },
    "metadata": {
      "description": "Pro plan monthly billing",
      "extra": []
    },
    "subscription_id": "SUB-2026-0001",
    "merchant_reff_no": "REF-0001",
    "payment_link_url": "https://pay.singapay.id/sub/9f8b6c2e",
    "parent_plan_id": null,
    "created_from": null
  }
}