# Update a maintenance window

`PATCH https://evohub.io/api/v1/maintenance-windows/{id}`

Part of the [On-Call API](https://docs-dev.evohub.io/oncall.md) reference · operationId `updateMaintenanceWindow`.

Changes the title, description (`body`) or times, for example to extend a
running window. A field left out is unchanged; a blank title is ignored.

**Permission (API-key scope):** `oncall:maintenance:write`.

## Authorization

Any one of:

- `bearerAuth` (oncall:maintenance:write)
- `apiKeyHeader` (oncall:maintenance:write)

Where:

- `bearerAuth`: HTTP Bearer — An EvoHub API key (`evohub_…`) as a bearer token.
- `apiKeyHeader`: API key in the header `X-API-Key` — An EvoHub API key (`evohub_…`).

## Path parameters

- `id` (string, required, example `c1d2e3f4-a5b6-4c7d-8e9f-0a1b2c3d4e5f`): The maintenance window's id.

## Request body (required)

Content type: `application/json`

Type: `MaintenanceWindowUpdate`

- `title` (string)
- `body` (string)
- `starts_at` (string (date-time))
- `ends_at` (string (date-time))

## Responses

### 200 — The window after the change.

Content type: `application/json`

Type: `object`

- `data` (MaintenanceWindow, required)
  - `id` (string)
  - `org_id` (string)
  - `title` (string)
  - `body` (string): What the maintenance does.
  - `starts_at` (string (date-time))
  - `ends_at` (string (date-time))
  - `created_by` (string)
  - `created_at` (string (date-time))
  - `ended_at` (string (date-time)): Set when the window was ended early.
  - `silence_oncall` (boolean): Whether paging is held back during the window.
- `success` (boolean, required, value `true`)

### 400 — The body is not JSON (`INVALID_BODY`), or the window would end before it starts or be longer than 30 days (`INVALID_WINDOW`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 401 — No API key was sent, or it is unknown, revoked or expired (`UNAUTHORIZED`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 403 — The key lacks the scope this endpoint needs (`FORBIDDEN`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 404 — No maintenance window with this id in your organization (`NOT_FOUND`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 429 — Too many requests (`RATE_LIMITED`). Wait `Retry-After` seconds.

Headers:

- `Retry-After` (integer): Seconds to wait.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

### 500 — Something went wrong on EvoHub's side (`INTERNAL_ERROR`). Retry later.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required): Machine-readable code. Branch on this.
  - `message` (string, required): Human-readable explanation.

## Example request

```bash
curl -X PATCH 'https://evohub.io/api/v1/maintenance-windows/c1d2e3f4-a5b6-4c7d-8e9f-0a1b2c3d4e5f' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer <TOKEN>' \
  -d '{
  "ends_at": "2026-10-13T01:00:00Z"
}'
```