# hours.amend

Change one of your submitted time entries (date, minutes, description, and optionally the custom field values) with its expectedRevision, as long as nobody has reviewed it yet. It stays submitted, and a reviewer who already opened it is told it changed.

`POST /api/v1/contractor/hours.amend`

Permissions: `contractor:read`, `contractor:write` · Roles: contractor · Idempotency key required · Send `expectedRevision`

MCP tool: `contractor_hours_amend`

## Fields

| Field | Type | Required | Notes |
| --- | --- | --- | --- |
| `id` | string (ID) | Yes | The record's ID. |
| `expectedRevision` | integer | Yes | The record's current revision, from the last time you read it. If someone changed the record since, the request is refused with a conflict so you can reload and check before trying again. at most 9007199254740991; greater than 0. |
| `idempotencyKey` | string | Yes | Any unique text you generate once per intended change, so a retried request only happens once. Send it as the Idempotency-Key header instead if you prefer; if you send both they must match. 8–150 characters. |
| `date` | string (date) | Yes | A date, as YYYY-MM-DD. |
| `minutes` | integer | Yes | 1 to 1440. |
| `description` | string | Yes | A short description. 1–2000 characters. |
| `values` | map |  |  |
| `confirmDuplicate` | boolean |  |  |
| `reason` | string |  | A short note saying why, kept in the record's history. at most 1000 characters. |

## Example request

```bash
curl https://app.getoatmilk.com/api/v1/contractor/hours.amend \
  -H "Authorization: Bearer $OATMILK_OAUTH_TOKEN" \
  -H "X-Accounting-Organization: $OATMILK_ORGANIZATION_ID" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "id": "9a8b7c6d-5e4f-4a3b-8c2d-1e0f9a8b7c6d",
  "expectedRevision": 3,
  "date": "2026-09-01",
  "minutes": 90,
  "description": "Synthetic example from the docs"
}'
```

Reference page: https://app.getoatmilk.com/docs/api/contractor/hours.amend