Help Center/ Simple Message Notification/ User Guide/ Subscription Management/ Overview

Updated on 2025-12-30 GMT+08:00

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Overview

What Is a Subscription?

A subscription is how you add endpoints to a topic. To deliver messages published to a topic to endpoints, you must add the subscription endpoints to the topic. The endpoint can be a phone number, email address, or an HTTP/HTTPS URL. After you add endpoints to the topic and the subscribers confirm the subscription, they are able to receive messages published to the topic.

You can add multiple subscriptions to each topic.

Constraints

**Table 1** Restrictions on subscriptions
Item	Quota	Description
Endpoint	10,000	None
Validity of a subscription confirmation link	48 hours	Confirm the subscription on your mobile phone, mailbox, or other endpoints in time.

Parent topic: Subscription Management

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