Every outbound message sent via Wazapin uses the same API endpoint. You specify a type (such as text, image, or template) and provide the respective content payload.

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Key concept: Session vs template

Before sending outbound messages, it is critical to understand the WhatsApp customer service window rules:
  • Session Messages: Free-form responses (text, media, buttons, lists) you can send within 24 hours of the customer’s last message.
  • Template Messages: Pre-approved structured messages required to initiate new conversations or message users outside the 24-hour window.
For a detailed explanation of these rules, see Customer service window.

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Pick a message type

Wazapin supports multiple message types based on your channel type:

Core & interactive

Text, buttons, and lists for conversational flows.

Media

Images, videos, audio, documents, and stickers.

Location & contacts

Location sharing, location requests, and contact cards.
To check feature availability across different WhatsApp channels, see Channel types and the Channel support matrix.

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After you send

  1. The API returns a 201 Created status code with a message record (typically with status queued).
  2. Track delivery progress using webhooks or poll the message status via GET /v1/messages/.
  3. Handle any errors by checking the Error codes reference.