An invoice line item refers to any service or product added to an invoice, along with any quantities or unit amounts that pertain to them. An invoice can have many line items.

Attribute	Description
id string	Unique identifier for the invoice line item.
name string	Name of the line item, typically a product or SKU name.
description string	An optional free-form description of the line item.
direction string	Either `debit` or `credit`. `debit` indicates that a client owes the business money and increases the invoice's `total_amount` due. `credit` has the opposite intention and effect.
amount int32	The total amount for this line item, specified in the invoice currency's smallest unit.
quantity int32	The number of units of a product or service that this line item is for. Must be a whole number. Defaults to 1 if not provided.
unit_amount int32	The cost per unit of the product or service that this line item is for specified in the invoice currency's smallest unit.
unit_amount_decimal string	The cost per unit of the product or service that this line item is for, specified in the invoice currency's smallest unit. Accepts decimal strings with up to 12 decimals.
metadata object	Additional data represented as key-value pairs. Both the key and value must be strings. See Metadata .

{
  "id": "2d3ed5fb-8bca-4d12-bfb8-3d314cb9887d",
  "object": "invoice_line_item",
  "live_mode": true,
  "amount": 72000,
  "description": "1 year subscription to this service",
  "direction": "debit",
  "name": "Service Monthly Subscription",
  "quantity": 12,
  "unit_amount": 6000,
  "created_at": "2023-01-23T20:56:19Z",
  "updated_at": "2023-01-23T20:56:19Z"
}