This topic describes the API operations that are available in Simple Message Queue (formerly MNS).
The following table lists the API operations that you can use to manage queues in SMQ.
| Operation | Description | Supported method |
| CreateQueue | Creates a queue. | Use the MNS console or call the API operation. |
| SetQueueAttributes | Modifies a queue. | |
| GetQueueAttributes | Queries queue information. | |
| DeleteQueue | Deletes a queue. | |
| ListQueue | Queries a queue list. |
| Operation | Description | Supported method |
| SendMessage | Sends a message. | Use the MNS console or call the API operation. |
| BatchSendMessage | Sends multiple messages at a time. | Call the API operation. |
| ReceiveMessage | Consumes a message. | Use the MNS console or call the API operation. |
| BatchReceiveMessage | Consumes multiple messages at a time. | Call the API operation. |
| DeleteMessage | Deletes a message. | Use the MNS console or call the API operation. |
| BatchDeleteMessage | Deletes multiple messages at a time. | Call the API operation. |
| PeekMessage | Views a message. | Call the API operation. |
| BatchPeekMessage | Views multiple messages at a time. | Call the API operation. |
| ChangeMessageVisibility | Modifies the visibility time of a message. | Call the API operation. |
The following table lists the API operations that you can use to manage topics in SMQ.
| Operation | Description | Supported method |
| CreateTopic | Creates a topic. | Use the MNS console or call the API operation. |
| SetTopicAttributes | Modifies a topic. | |
| GetTopicAttributes | Queries topic information. | |
| DeleteTopic | Deletes a topic. | |
| ListTopic | Queries a topic list. |
| Operation | Description | Supported method |
| Subscribe | Creates a subscription. | Use the MNS console or call the API operation. |
| SetSubscriptionAttributes | Modifies a subscription. | |
| GetSubscriptionAttributes | Queries the information of a subscription. | |
| Unsubscribe | Deletes a subscription. | |
| ListSubscriptionByTopic | Queries the subscription list of a topic. |
| Operation | Description | Supported method |
| PublishMessage | Publishes a message. | Use the MNS console or call the API operation. |