#### URL Expired

The URL for this request expired after 30 days.

### Optional metadata when starting an operation.

| Field        | Type   | Description                                      |
|--------------|--------|--------------------------------------------------|
| OperationID  | string | Unique operation identifier.                      |
| InitiatorID  | string | Initiator identifier.                            |
| Name         | string | required: Master key name.                       |

# Status Codes

# `` 200      Operation started

# `` 400      Invalid input, validation error, or malformed request

# `` 500      Internal server error. May include an `errorCode` (M-prefixed) and `data` from the MPA error code system. See `cwpapi/errors.go` for codes.

### API Request Example

Base URL

`https://api.your-wallet.blockdaemon-wallet.com/api/cwp/operations/start/backupMasterKey`

```
curl --request POST \
     --url https://api.your-wallet.blockdaemon-wallet.com/api/cwp/operations/start/backupMasterKey \
     --header 'accept: application/json' \
     --header 'content-type: application/json'
```

Click `Try It!` to start a request and see the response here! Or choose an example:

| Status Code | Description |
|-------------|-------------|
| 200         | Operation started |
| 400         | Invalid input, validation error, or malformed request |
| 500         | Internal server error. |