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Simple Message Queue (formerly MNS):ListTopic

Last Updated:Oct 08, 2026

Queries the topics under an Alibaba Cloud account. The query results can be paginated.

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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

mns:ListTopic

list

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

PageNum

integer

No

The page number of the returned results. Valid values: 1 to 100000000. If the specified value is less than 1, the system defaults to 1. If the specified value is greater than 100000000, the system defaults to 100000000.

1

PageSize

integer

No

The number of entries to return on each page. Valid values: 10 to 50. If the specified value is less than 10, the system defaults to 10. If the specified value is greater than 50, the system defaults to 50.

20

TopicName

string

No

The name of the topic.

test

Tag

array<object>

No

The list of tags.

object

No

The tag value corresponding to the tag key.

Key

string

No

The key of the tag.

tag1

Value

string

No

The value of the tag.

test

TopicType

string

No

The type of the topic. Valid values:

  • normal: normal topic

  • fifo: FIFO topic

normal

Response elements

Element

Type

Description

Example

object

RequestId

string

The ID of the request.

06273500-249F-5863-121D-74D51123****

Code

integer

The response code.

200

Status

string

The status of the response.

Success

Message

string

The response message.

operation success

Success

boolean

Indicates whether the request is successful.

true

Data

object

The response data.

PageNum

integer

The page number of the returned results.

1

PageSize

integer

The number of entries returned on each page.

50

Total

integer

The total number of results.

130

PageData

array<object>

The results returned on the current page.

array<object>

The data item.

TopicName

string

The name of the topic.

demo-topic

MessageCount

integer

The number of messages in the topic.

0

MaxMessageSize

integer

The maximum length of the message body that can be sent to the topic. Unit: bytes.

65536

MessageRetentionPeriod

integer

The maximum retention period of messages in the topic. After the specified period elapses from the time a message is sent to the topic, the message is deleted regardless of whether it is successfully pushed to users. Unit: seconds.

86400

CreateTime

integer

The time when the topic was created. The value is a UTC UNIX timestamp in seconds.

1449554962

LastModifyTime

integer

The time when the topic attributes were last modified. The value is a UTC UNIX timestamp in seconds.

1449554962

LoggingEnabled

boolean

Indicates whether the log management feature is enabled. Valid values:

  • True: enabled

  • False: disabled

True

TopicUrl

string

The URL of the topic.

http:// 111111111****.mns.us-west-1.aliyuncs.com/topics/testTopic

TopicInnerUrl

string

The internal URL of the topic.

http:// 111111111****.mns.us-west-1-internal.aliyuncs.com/topics/testTopic

Tags

array<object>

The list of resource tags.

object

The tag value corresponding to the tag key.

TagKey

string

The key of the tag.

tag1

TagValue

string

The value of the tag.

test

TopicType

string

The type of the topic. Valid values:

  • normal: normal topic

  • fifo: FIFO topic

normal

EnableSSE

boolean

Specifies whether server-side encryption is enabled. Valid values: true and false.

true

SseType

string

The server-side encryption method. Valid values: SMQ and KMS.

KMS

SseAlgorithm

string

The server-side encryption algorithm. Currently, AES-256-GCM is supported. If this parameter is not specified, the default algorithm is used.

AES-256-GCM

KmsKeyId

string

The KMS key ID.

key-xxx

EncryptionEnabled

boolean

Indicates whether server-side encryption is enabled.

true

Examples

Success response

JSON format

{
  "RequestId": "06273500-249F-5863-121D-74D51123****",
  "Code": 200,
  "Status": "Success",
  "Message": "operation success",
  "Success": true,
  "Data": {
    "PageNum": 1,
    "PageSize": 50,
    "Total": 130,
    "PageData": [
      {
        "TopicName": "demo-topic",
        "MessageCount": 0,
        "MaxMessageSize": 65536,
        "MessageRetentionPeriod": 86400,
        "CreateTime": 1449554962,
        "LastModifyTime": 1449554962,
        "LoggingEnabled": true,
        "TopicUrl": "http:// 111111111****.mns.us-west-1.aliyuncs.com/topics/testTopic",
        "TopicInnerUrl": "http:// 111111111****.mns.us-west-1-internal.aliyuncs.com/topics/testTopic",
        "Tags": [
          {
            "TagKey": "tag1",
            "TagValue": "test"
          }
        ],
        "TopicType": "normal",
        "EnableSSE": true,
        "SseType": "KMS",
        "SseAlgorithm": "AES-256-GCM",
        "KmsKeyId": "key-xxx",
        "EncryptionEnabled": true
      }
    ]
  }
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.