Webhook subscriptions
A webhook subscription is a rule that defines which events trigger notifications and where those notifications are delivered. Instead of configuring webhooks for each message individually, set up subscriptions once per channel. You then receive all matching events at your webhook URL in real time.
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For multi-tenant platforms using CPaaS X, see Webhook subscriptions in CPaaS X for scoped event delivery by application and entity.
Subscription categories [#subscription-categories]
Subscriptions are organized by categories, which define the source or type of events.
| Category | Description | Includes |
|---|---|---|
| Channels | Communication platforms where you send messages. | SMS, MMS, Email, WhatsApp, TikTok, Viber, RCS, Voice and WebRTC, Facebook, LINE, Kakao (Alim, Brand Messaging), Zalo, Apple Messages for Business, Mobile push, Open Channel. |
| Numbers and senders | Events from your communication resources. | Registration, Mobile identity, Number lookup. |
| Tools | Platform features and services. | Blocklist, Customer Engagement / AgentOS. |
Each category offers its own list of supported events. See Available webhook events for the complete reference.
Core concepts [#core-concepts]
Learn how subscriptions work and how their parts fit together:
Set up and reference
Create and manage subscriptions, and look up events and deletion rules:
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