curl --request GET \
  --url https://api.getlago.com/api/v1/subscriptions/{external_id}/charges/{charge_code} \
  --header 'Authorization: Bearer <token>'

{
  "charge": {
    "lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
    "lago_billable_metric_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
    "billable_metric_code": "requests",
    "created_at": "2022-09-14T16:35:31Z",
    "charge_model": "dynamic",
    "pay_in_advance": true,
    "invoiceable": true,
    "regroup_paid_fees": "invoice",
    "prorated": false,
    "min_amount_cents": 1200,
    "properties": {
      "grouped_by": [
        "agent_name"
      ],
      "pricing_group_keys": [
        "agent_name"
      ],
      "graduated_ranges": [
        {
          "from_value": 0,
          "to_value": 10,
          "flat_amount": "10",
          "per_unit_amount": "0.5"
        }
      ],
      "graduated_percentage_ranges": [
        {
          "from_value": 0,
          "to_value": 10,
          "rate": "1",
          "flat_amount": "10"
        }
      ],
      "amount": "30",
      "free_units": 100,
      "package_size": 1000,
      "rate": "1",
      "fixed_amount": "0.5",
      "free_units_per_events": 5,
      "free_units_per_total_aggregation": "500",
      "per_transaction_max_amount": "3.75",
      "per_transaction_min_amount": "1.75",
      "volume_ranges": [
        {
          "from_value": 0,
          "to_value": 10,
          "flat_amount": "10",
          "per_unit_amount": "0.5"
        }
      ]
    },
    "filters": [
      {
        "invoice_display_name": "AWS",
        "properties": {
          "grouped_by": [
            "agent_name"
          ],
          "pricing_group_keys": [
            "agent_name"
          ],
          "graduated_ranges": [
            {
              "from_value": 0,
              "to_value": 10,
              "flat_amount": "10",
              "per_unit_amount": "0.5"
            }
          ],
          "graduated_percentage_ranges": [
            {
              "from_value": 0,
              "to_value": 10,
              "rate": "1",
              "flat_amount": "10"
            }
          ],
          "amount": "30",
          "free_units": 100,
          "package_size": 1000,
          "rate": "1",
          "fixed_amount": "0.5",
          "free_units_per_events": 5,
          "free_units_per_total_aggregation": "500",
          "per_transaction_max_amount": "3.75",
          "per_transaction_min_amount": "1.75",
          "volume_ranges": [
            {
              "from_value": 0,
              "to_value": 10,
              "flat_amount": "10",
              "per_unit_amount": "0.5"
            }
          ]
        },
        "values": {
          "region": [
            "us-east-1"
          ]
        }
      }
    ],
    "code": "api_requests_charge",
    "invoice_display_name": "Setup",
    "taxes": [
      {
        "lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
        "name": "TVA",
        "code": "french_standard_vat",
        "rate": 20,
        "applied_to_organization": true,
        "created_at": "2023-07-06T14:35:58Z",
        "description": "French standard VAT"
      }
    ],
    "applied_pricing_unit": {
      "code": "unit_code",
      "conversion_rate": "0.5"
    },
    "accepts_target_wallet": false,
    "lago_parent_id": "1a901a90-1a90-1a90-1a90-1a901a901a90"
  }
}