Create an invoice line
Finance module
POST/invoice-linesinvoiceLines.create
A line of an invoice. Creates an invoice line. Requires `Idempotency-Key`; a replay returns the original response. The organization is derived from the credential or the parent row, never from the body.
- Requires the capability finance.invoice.write.
- OAuth scopes: finance.
- Send an Idempotency-Key header. A replay with the same key returns the original response.
- Error statuses: 400, 401, 409, 422, 429. Errors are RFC 9457 problem details.
Request body: InvoiceLineCreate
| Field | Type | Required | Description |
|---|---|---|---|
| invoice_id | string (uuid) | Yes | Identifier of the invoice. |
| description | string | Yes | Line description.Constraints: length 1 to 300 |
| quantity | number | null | No | Quantity. |
| unit_price_minor | integer (int64) | null | No | Unit price. Integer minor units of the resource currency; null means unpriced, never zero. |
| line_number | integer | Yes | Line number within the invoice.Constraints: range 1 to any |
| budget_line_id | string (uuid) | null | No | Identifier of the budget line. |
| tax_rate_id | string (uuid) | null | No | Identifier of the tax rate. |
| urid | UridAtAnyGrain | null | No |
{
"invoice_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"description": "Stage deck rental",
"quantity": 24,
"unit_price_minor": 4500,
"line_number": 1,
"budget_line_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"tax_rate_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f"
}Response 201: InvoiceLine
| Field | Type | Required | Description |
|---|---|---|---|
| id | string (uuid) | Yes | Identifier of the invoice line. |
| org_id | string (uuid) | Yes | Identifier of the owning organization, derived from the parent row and never accepted from the caller. |
| created_at | string (date-time) | Yes | When the row was created. |
| created_by | string (uuid) | null | Yes | Identifier of the person who created the row; null when a seed, platform or system process created it. |
| updated_at | string (date-time) | Yes | When the row was last updated. |
| updated_by | string (uuid) | null | Yes | Identifier of the person who last updated the row; null when a seed, platform or system process updated it. |
| invoice_id | string (uuid) | Yes | Identifier of the invoice. |
| description | string | Yes | Line description.Constraints: length 1 to 300 |
| quantity | number | null | Yes | Quantity. |
| unit_price_minor | integer (int64) | null | Yes | Unit price. Integer minor units of the resource currency; null means unpriced, never zero. |
| line_number | integer | Yes | Line number within the invoice.Constraints: range 1 to any |
| budget_line_id | string (uuid) | null | Yes | Identifier of the budget line. |
| tax_rate_id | string (uuid) | null | Yes | Identifier of the tax rate. |
| urid | UridAtAnyGrain | null | Yes |
{
"id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"org_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"created_at": "2026-10-08T14:30:00Z",
"created_by": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"updated_at": "2026-10-08T14:30:00Z",
"updated_by": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"invoice_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"description": "Stage deck rental",
"quantity": 24,
"unit_price_minor": 4500,
"line_number": 1,
"budget_line_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"tax_rate_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"urid": "4000.01"
}Code samples
curl -X POST "$XOS_BASE_URL/invoice-lines" \
-H "Authorization: Bearer $XOS_API_KEY" \
-H "Idempotency-Key: $(uuidgen)" \
-H "Content-Type: application/json" \
-d '{"invoice_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","description":"Stage deck rental","quantity":24,"unit_price_minor":4500,"line_number":1,"budget_line_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","tax_rate_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f"}'const { data } = await xos.invoiceLines.create({
"invoice_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"description": "Stage deck rental",
"quantity": 24,
"unit_price_minor": 4500,
"line_number": 1,
"budget_line_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"tax_rate_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f"
});response = xos.invoice_lines.create({"invoice_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", "description": "Stage deck rental", "quantity": 24, "unit_price_minor": 4500, "line_number": 1, "budget_line_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", "tax_rate_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f"})xos invoice-lines create --data '{"invoice_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","description":"Stage deck rental","quantity":24,"unit_price_minor":4500,"line_number":1,"budget_line_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","tax_rate_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f"}'