#### URL Expired

The URL for this request expired after 30 days.

Optional metadata when starting an operation.

**OperationID**  
string  
Unique operation identifier.

**InitiatorID**  
string  
Initiator identifier.

**Name**  
string  
required  
Master key name.

# `` 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/createMasterKey

```
xxxxxxxxxx

curl --request POST \

--url https://api.your-wallet.blockdaemon-wallet.com/api/cwp/operations/start/createMasterKey \

--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:

**Response Status Codes**  
`200`  
`400`  
`500`

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