API Overview

**Table 1** APIs for managing instances
API	Description
Lifecycle management	Create an instance, list all instances, query an instance, delete an instance, modify instance information, restart or delete instances in batches, and obtain or modify instance specifications.
Instance management	Reset the password, reset Kafka Manager password, restart Kafka Manager, configure automatic topic creation, modify the private IP address for cross-VPC access, query Kafka cluster metadata, query consumer group details, query coordinator details of a Kafka instance, reassign replicas of a topic for a Kafka instance, query the disk usage status of topics, query all consumer groups, batch delete consumer groups of a Kafka instance, create a consumer group, edit a consumer group, initiate partition reassigning for a Kafka instance, disable Kafka Manager, delete a user or client quota, query user or client quotas, create user or client quotas, modify user or client quotas, and reset consumer group offset to the specified position.
Smart Connect	Enable Smart Connect (pay-per-use instance), disable Smart Connect (pay-per-use instance), create a Smart Connect task, query Smart Connect tasks, query Smart Connect task details, delete a Smart Connect task, pause a Smart Connect task, restart a Smart Connect task, and start a Smart Connect task or restart a paused or running Smart Connect task.
Specification change management	Query product information for instance specification modification, and increasing instance specifications.
Topic management	Create a topic for a Kafka instance, produce messages to Kafka, list topics of a Kafka instance, modify topics of a Kafka instance, batch delete topics of a Kafka instance, query the partition list of a topic, query the current producer list of a topic, and query topic details.
User management	List users, create a user, batch delete users, reset the user password, modify user parameters, query user permissions, and configure user permissions.
Message query	Query messages, query a message with a specified offset, query a message with a specified time period, query offset of the earliest message in a partition, and query offset of the latest message in a partition.
Background task management	List background tasks, query a background task, and delete a background task.
Tag management	Add or delete tags in batches, list tags of an instance, and list tags of a project.
Diagnosis management	Pre-check before diagnosing message stack, create a message stack diagnosis task, query the message stack diagnosis report list, batch deleting message stack diagnosis reports, and query diagnosis report details.
Others	List AZ information, query product specifications, query Kafka instance monitoring dimensions, and list maintenance time windows.