---
title: changes.create | Doing Work API
description: Write a change order on a job: a priced change to its scope, from lines a worker wrote (never filled in by AI). Discount lines take work out; a change orde
url: https://doingwork.work/docs/reference/changes-create/
---

# changes.create

Write a change order on a job: a priced change to its scope, from lines a worker wrote (never filled in by AI). Discount lines take work out; a change order may total less than 0 (a credit). Tax: the shop default rate unless tax_rate_id is given (null for no tax). It starts as a draft; send it to the customer with changes.send.

|  |  |
|---|---|
| Who | Agents can call this |
| REST | `POST /v1/change-orders` |
| MCP tool | `changes_create` |
| Writes | yes, send an Idempotency-Key |
| Area | [Field work (checklists, forms, time, notes, change orders, subcontractors)](https://doingwork.work/docs/reference/#field-work-checklists-forms-time-notes-change-orders-subcontractors) |

## When to use it

A change order is a priced change to a job's scope: extra work, or a credit for work taken out. A worker writes the lines (changes.create; never fill prices in yourself).

## What to tell the owner

Say what you did in plain words and what happens next.

## Input

| Field | Type | Required |
|---|---|---|
| `job_id` | string (uuid) | yes |
| `title` | string | yes |
| `description` | string | no |
| `lines` | array | yes |
| `lines[].description` | string | yes |
| `lines[].quantity` | number | yes |
| `lines[].unit_price_minor` | integer | yes |
| `lines[].kind` | string (one of item, fee, discount) | no |
| `lines[].taxable` | boolean | no |
| `tax_rate_id` | ['string', 'null', ' ', '(', 'u', 'u', 'i', 'd', ')'] | no |

## Example

```http
POST https://doingwork.work/v1/change-orders
content-type: application/json
Idempotency-Key: 3f1c...

{
  "job_id": "00000000-0000-4000-8000-000000000000",
  "title": "...",
  "lines": [
    {
      "description": "40 gallon gas heater, installed",
      "quantity": "...",
      "unit_price_minor": 50000
    }
  ]
}
```

## Output

JSON. The response shape isn't published yet; read the fields you need and ignore the rest. Errors are `{code, message, status}`.

## Errors

| Code | Status | What to do |
|---|---|---|
| `invalid_input`, `invalid_token`, `rate_limited` |  | Can happen on any call. See [errors](https://doingwork.work/docs/errors/). |