API Overview

**Table 1** APIs for managing instances
API	Description
Lifecycle Management	Includes Querying the Instance List Querying an Instance Deleting an Instance Modifying Instance Information Batch Deleting Instances Querying the Broker List
Consumer Group Management	Includes: Querying the Consumer Group List Creating a Consumer Group or Batch Deleting Consumer Groups Batch Modifying Consumer Groups Deleting a Consumer Group Querying a Consumer Group Modifying a Consumer Group Querying the Consumer Group List or Details Resetting the Consumer Offset Querying the Consumer List
Topic Management	Includes: Creating a Topic or Deleting Topics in Batches Querying the Topic List Deleting a Topic Querying a Topic Modifying a Topic Querying the Topic Consumer Group List Querying the Number of Messages in a Topic
Message Management	Includes: Querying Messages Querying the Message Trace Exporting Dead Letter Messages Resending Dead Letter Messages Verifying Consumption
User Management	Includes: Creating a User Querying the User List Modifying User Parameters Querying User Details Deleting a User Querying Users Granted Permissions for a Topic Querying Users Granted Permissions for a Consumer Group
Metadata Migration	Includes: Creating a Metadata Migration Task Querying All Migration Tasks or a Specified Migration Task of an Instance Deleting a Metadata Migration Task
Managing Parameters	Includes: Querying RocketMQ Configurations Modifying RocketMQ Configurations
Tag Management	Includes: Adding or Deleting Tags in Batches
Other APIs	Includes: Querying AZ Information
Specification Modification Management	Includes: Querying Product Information for Instance Specification Modification Modifying Instance Specifications