curl --request GET \
  --url https://api.metronome.com/v1/planDetails/{plan_id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "d46c3bce-40a6-4fbf-9b45-fcb00d45ad5f",
    "name": "Plan with Minimums",
    "description": "A plan with minimums",
    "credit_grants": [
      {
        "name": "Acme Corp Promotional Credit Grant",
        "amount_granted": 2400,
        "amount_paid": 1500,
        "effective_duration": 3,
        "priority": "1",
        "send_invoice": true,
        "reason": "Prepaid grant",
        "recurrence_interval": 1,
        "amount_granted_credit_type": {
          "id": "2714e483-4ff1-48e4-9e25-ac732e8f24f2",
          "name": "USD (cents)"
        },
        "amount_paid_credit_type": {
          "id": "2714e483-4ff1-48e4-9e25-ac732e8f24f2",
          "name": "USD (cents)"
        }
      }
    ],
    "minimums": [
      {
        "name": "Invoice minimum",
        "value": 10000,
        "start_period": 0,
        "credit_type": {
          "id": "2714e483-4ff1-48e4-9e25-ac732e8f24f2",
          "name": "USD (cents)"
        }
      }
    ],
    "overage_rates": [
      {
        "start_period": 0,
        "to_fiat_conversion_factor": 1600,
        "fiat_credit_type": {
          "id": "2714e483-4ff1-48e4-9e25-ac732e8f24f2",
          "name": "USD (cents)"
        },
        "credit_type": {
          "id": "d46c3bce-40a6-4fbf-9b45-fcb00d45ad5f",
          "name": "MetroBux"
        }
      }
    ],
    "custom_fields": {
      "x_account_id": "KyVnHhSBWl7eY2bl"
    }
  }
}