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Simple Application Server:AttachKeyPair

Last Updated:Jan 15, 2026

Binds a key pair to simple application servers.

Operation description

You can bind only one key pair to a simple application server in the Simple Application Server console. If a simple application server has a key pair bound, the new key pair overwrites the original key pair.

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

swas-open:AttachKeyPair

update

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

RegionId

string

Yes

The region ID of the simple application server. You can call the ListRegions operation to query the most recent region list.

cn-hangzhou

ClientToken

string

No

The client token that is used to ensure the idempotence of the request. You can use the client to generate the token, but you must make sure that the token is unique among different requests. The token can contain only ASCII characters and cannot exceed 64 characters in length. For more information, see How to ensure idempotence.

123e4567-e89b-12d3-a456-426655440000

InstanceIds

array

Yes

The IDs of simple application servers. You can specify a maximum of 50 IDs of simple application servers.

string

No

The ID of the simple application server to which you want to bind the SSH key pair. You can specify a maximum of 50 IDs of simple application servers.

2ad1ae67295445f598017499dc****

KeyPairName

string

Yes

The name of the key pair that you want to bind to the simple application server. The name must be 2 to 64 characters in length and can contain letters, digits, colons (:), underscores (_), and hyphens (-). The name must start with a letter but cannot start with http:// or https://.

test

Response elements

Element

Type

Description

Example

object

RequestId

string

The request ID.

30637AD6-D977-4833-A54C-CC89483E****

TotalCount

integer

The total number of simple application servers to which the key pair is bound.

2

FailCount

integer

The total number of simple application servers to which the key pair failed to be bound.

2

Results

array<object>

The request results.

object

The operation results.

Code

string

The HTTP status code.

200

Message

string

The response message.

success

Success

string

Indicates whether the key pair is bound to the simple application server successfully. Valid values:

  • true

  • false

true

InstanceId

string

The simple application server ID.

aa6e71ddb35c46679bc4753d6219d604

Examples

Success response

JSON format

{
  "RequestId": "30637AD6-D977-4833-A54C-CC89483E****",
  "TotalCount": 2,
  "FailCount": 2,
  "Results": [
    {
      "Code": "200",
      "Message": "success",
      "Success": "true",
      "InstanceId": "aa6e71ddb35c46679bc4753d6219d604"
    }
  ]
}

Error codes

HTTP status code

Error code

Error message

Description

404 InvalidInstanceId.NotFound The specified Instance Id does not exist. The specified instance ID does not exist.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.