# Return One Maintenance Window for One Project

**GET /api/atlas/v1.0/groups/{groupId}/maintenanceWindow**

Returns the maintenance window for the specified project. MongoDB Cloud starts those maintenance activities when needed. You can't change your maintenance window until the current maintenance efforts complete. The maintenance procedure that MongoDB Cloud performs requires at least one replica set election during the maintenance window per replica set. Maintenance always begins as close to the scheduled hour as possible, but in-progress cluster updates or unexpected system issues could delay the start time. To use this resource, the requesting Service Account or API Key must have the Project Owner role.


## Servers
- https://cloud.mongodb.com: https://cloud.mongodb.com ()


## Authentication methods
- Service accounts
- Digest auth


## Parameters

#### Path parameters
- **groupId** (string)
  Unique 24-hexadecimal digit string that identifies your project. Use the [/groups](#tag/Projects/operation/listProjects) endpoint to retrieve all projects to which the authenticated user has access.

**NOTE**: Groups and projects are synonymous terms. Your group id is the same as your project id. For existing groups, your group/project id remains the same. The resource and corresponding endpoints use the term groups.

#### Query parameters
- **envelope** (boolean)
  Flag that indicates whether Application wraps the response in an `envelope` JSON object. Some API clients cannot access the HTTP response headers or status code. To remediate this, set envelope=true in the query. Endpoints that return a list of results use the results object as an envelope. Application adds the status parameter to the response body.
- **pretty** (boolean)
  Flag that indicates whether the response body should be in the prettyprint format.


## Responses
### 200: OK

#### Body Parameters: application/json (object)
- **autoDeferOnceEnabled** (boolean)
  Flag that indicates whether MongoDB Cloud should defer all maintenance windows for one week after you enable them.
- **dayOfWeek** (integer(int32))
  One-based integer that represents the day of the week that the maintenance window starts.

- `1`: Sunday.
- `2`: Monday.
- `3`: Tuesday.
- `4`: Wednesday.
- `5`: Thursday.
- `6`: Friday.
- `7`: Saturday.
- **hourOfDay** (integer(int32))
  Zero-based integer that represents the hour of the of the day that the maintenance window starts according to a 24-hour clock. Use `0` for midnight and `12` for noon.
- **numberOfDeferrals** (integer(int32))
  Number of times the current maintenance event for this project has been deferred.
- **protectedHours** (object)
  Defines the a window where maintenance will not begin within.
- **startASAP** (boolean)
  Flag that indicates whether MongoDB Cloud starts the maintenance window immediately upon receiving this request. To start the maintenance window immediately for your project, MongoDB Cloud must have maintenance scheduled and you must set a maintenance window. This flag resets to `false` after MongoDB Cloud completes maintenance.
- **timeZoneId** (string)
  Identifier for the current time zone of the maintenance window. This can only be updated via the Project Settings UI.

### 401: Unauthorized.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.

### 403: Forbidden.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.

### 404: Not Found.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.

### 500: Internal Server Error.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.


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