{
  "title": "Rutter Invoice",
  "description": "Structure of an invoice from a connected accounting platform via the Rutter Unified API",
  "fields": [
    {
      "name": "id",
      "type": "string",
      "required": true,
      "description": "Unique identifier for the invoice"
    },
    {
      "name": "customer_id",
      "type": "string",
      "required": false,
      "description": "The ID of the customer this invoice belongs to"
    },
    {
      "name": "status",
      "type": "string",
      "required": true,
      "description": "Current invoice status: draft, open, paid, voided"
    },
    {
      "name": "amount_due",
      "type": "number",
      "required": false,
      "description": "Total amount due on the invoice"
    },
    {
      "name": "currency",
      "type": "string",
      "required": false,
      "description": "ISO 4217 currency code (e.g., USD, EUR, GBP)"
    },
    {
      "name": "due_date",
      "type": "string (date)",
      "required": false,
      "description": "Date the invoice is due (YYYY-MM-DD)"
    },
    {
      "name": "line_items",
      "type": "array of objects",
      "required": false,
      "description": "Line items on the invoice",
      "fields": [
        {"name": "description", "type": "string"},
        {"name": "quantity", "type": "number"},
        {"name": "unit_price", "type": "number"},
        {"name": "total_amount", "type": "number"}
      ]
    }
  ]
}