API Overview

**Table 1** APIs for managing instances
API	Description
Lifecycle Management	Includes Querying the Instance List Creating an Instance Querying an Instance Deleting an Instance Modifying Instance Information Batch Deleting Instances Querying the Broker List Enabling Domain Name Access to a RocketMQ Instance
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 Sending a Message 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 Querying Instance Tags Querying Project Tags
Diagnosing an Instance	Includes: Creating an Instance Diagnosis Task Querying an Instance Diagnosis Report List Deleting Instance Diagnosis Records in Batches Querying an Instance Diagnosis Report Querying Stack Information
Specification Modification Management	Includes: Querying Product Information for Instance Specification Modification Modifying Instance Specifications
Managing Instances	Includes: Querying an Instance Broker Restarting an Instance Modifying SSL of an Instance
Managing Background Tasks	Includes: Querying a Specific Record from Background Tasks Deleting a Specific Record from Background Tasks Querying a Background Task List of an Instance
Other APIs	Includes: Querying AZ Information Querying Flavor List Querying vCPUs of a RocketMQ Flavor