---
title: "Add Order Items to Invoice"
method: POST
path: "/invoices/{invoice_id}/items:order"
---

# Add Order Items to Invoice

`POST /invoices/{invoice_id}/items:order`

## Request

- Base URL: `https://api.roapp.io/v2`
- URL: `https://api.roapp.io/v2/invoices/{invoice_id}/items:order`
- Auth: HTTP bearer
- TypeScript: <https://skmtc.dev/roapp/apis/ro-app-public-api-v2/docs/invoices/:invoice_id/items:order/post.ts> (a function with typed inputs; its response is checked against the schema)

Adds specified order items to an existing invoice.

## Path parameters

- `invoice_id` number, required

## Request body

- object
  - `order_item_ids` number[], required: List of Order Item IDs

## Response `200`

## Changes

- **2026-11-03** `df0f57c15ea0`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/roapp/apis/ro-app-public-api-v2/changes/invoices/:invoice_id/items:order/post.md)

---

[API](https://skmtc.dev/roapp/apis/ro-app-public-api-v2.md) - [All operations](https://skmtc.dev/roapp/apis/ro-app-public-api-v2/llms.txt) - [OpenAPI document](https://skmtc.dev/roapp/apis/ro-app-public-api-v2/revisions/df0f57c15ea0?raw)