curl --request GET \
  --url https://api.ledger.so/v1/cards/{id} \
  --header 'Authorization: Bearer <token>'

{
  "ok": true,
  "data": {
    "id": "card_mno345",
    "customerId": "cus_abc123",
    "type": "virtual",
    "status": "active",
    "last4": "4242",
    "expirationMonth": 12,
    "expirationYear": 2027,
    "spendingLimit": {
      "amount": 5000,
      "frequency": "per24HourPeriod"
    },
    "createdAt": "2025-01-15T13:00:00Z"
  }
}