API Overview

By calling SMN APIs, you can use all functions provided by SMN, for example, creating a topic and adding a subscription.

**Table 1** API description
Category	Description
Topics	Create, modify, and delete a topic.
Subscriptions	Query subscriptions, add a subscription, and delete a subscription.
Templates	Create, modify, and delete a message template.
Message publishing	Publish messages in the different formats, including text, JSON, and message template.
Resource tags	Query resources by tag, add resource tags, and query tags.
Version querying	Query SMN API versions and information about the SMN API v2 version.