This API allows you to enable a CMK. Only an enabled CMK can be used.

Only a disabled CMK can be enabled.

**Table 1** Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID

**Table 2** Request parameters
Parameter	Mandatory	Type	Description
key_id	Yes	String	36-byte ID of a CMK that matches the regular expression ^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$ Example: 0d0466b0-e727-4d9c-b35d-f84bb474a37f
sequence	No	String	36-byte serial number of a request message Example: 919c82d4-8046-4722-9094-35c3c6524cff

**Table 3** Response parameters
Parameter	Mandatory	Type	Description
key_info	Yes	Array of objects	Information about keys. For details, see Table 4.

**Table 4** **key_info** field description
Parameter	Mandatory	Type	Description
key_id	Yes	String	CMK ID
key_state	Yes	String	CMK status: 2 indicates that the CMK is enabled. 3 indicates that the CMK is disabled. 4 indicates that the CMK is scheduled for deletion.

The following example describes how to enable a CMK whose ID is 0d0466b0-e727-4d9c-b35d-f84bb474a37f.

Example request

{
    "key_id": "0d0466b0-e727-4d9c-b35d-f84bb474a37f"
}

Example response

{
    "key_info": {
        "key_id": "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
        "key_state": "2"
    }
}

or

{
    "error": {
        "error_code": "KMS.XXXX",
        "error_msg": "XXX"
    }
}

Table 5 lists the normal status code returned by the response.

**Table 5** Status codes
Status Code	Status	Description
200	OK	Request processed successfully.

Exception status code. For details, see Status Codes.

Enabling a CMK