# Get invoice with line items

Returns details of a specific invoice including all line items.

Endpoint: GET /invoices/{invoiceId}
Version: 1.0.0
Security: ApiKeyAuth, OrgIdAuth

## Path parameters:

  - `invoiceId` (string, required)
    Unique identifier for the invoice
    Example: "d4c124bb-f2fd-4117-b1ec-e3021e4fa6c8"

## Response 200 fields (application/json):

  - `invoice` (object)

  - `invoice.id` (string, required)
    Unique identifier for the invoice

  - `invoice.orgId` (string, required)
    Organization ID

  - `invoice.amount` (string, required)
    Total invoice amount
    Example: "19.99"

  - `invoice.currency` (string, required)
    Currency code
    Example: "usd"

  - `invoice.status` (string, required)
    Invoice status
    Enum: "pending", "paid", "failed", "cancelled"

  - `invoice.stripeInvoiceId` (string,null)
    Stripe invoice ID
    Example: "inv_..."

  - `invoice.stripeInvoiceUrl` (string,null)
    Stripe invoice URL
    Example: "https://invoice.stripe.com/..."

  - `invoice.periodStart` (string, required)
    Billing period start

  - `invoice.periodEnd` (string, required)
    Billing period end

  - `invoice.paidAt` (string,null)
    Payment timestamp

  - `invoice.createdAt` (string)

  - `invoice.updatedAt` (string)

  - `lineItems` (array)

  - `lineItems.id` (string, required)
    Unique identifier for the line item

  - `lineItems.invoiceId` (string, required)
    Associated invoice ID

  - `lineItems.workTaskId` (string,null)
    Associated work task ID

  - `lineItems.description` (string, required)
    Line item description
    Example: "Model API calls - 2.5 hours"

  - `lineItems.quantity` (string, required)
    Quantity (decimal)
    Example: "2.5000"

  - `lineItems.unitPrice` (string, required)
    Price per unit
    Example: "10.00"

  - `lineItems.amount` (string, required)
    Total line item amount
    Example: "25.00"

## Response 400 fields (application/json):

  - `error` (string)
    Error message
    Example: "Missing required headers"

  - `details` (string)
    Additional error details
    Example: "x-api-key and x-org-id headers are required"

## Response 401 fields (application/json):

  - `error` (string)
    Error message
    Example: "Missing required headers"

  - `details` (string)
    Additional error details
    Example: "x-api-key and x-org-id headers are required"

## Response 403 fields (application/json):

  - `error` (string)
    Error message
    Example: "Missing required headers"

  - `details` (string)
    Additional error details
    Example: "x-api-key and x-org-id headers are required"

## Response 404 fields (application/json):

  - `error` (string)
    Error message
    Example: "Missing required headers"

  - `details` (string)
    Additional error details
    Example: "x-api-key and x-org-id headers are required"