WhatsApp (Cloud API)

WeZend speaks to WhatsApp through Meta's official Cloud API — no third-party middleman. You bring your own Meta Business account; WeZend handles sending, receiving, delivery receipts and conversation threading.

What you need from Meta

1. A Meta Business account with a WhatsApp Business App.
2. A phone number ID and a permanent access token (created in Meta's developer console under WhatsApp → API Setup).

Connect the channel

Open Settings → Channels → WhatsApp and paste the phone number ID and access token. Via API:

curl -X PUT https://api.wezend.com/v1/channels/whatsapp \
  -H "X-API-Key: $WEZEND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "phone_number_id": "1045…", "access_token": "EAAG…" }'

Then set WeZend's webhook URL (shown on the same settings page) in Meta's console so inbound messages and status updates reach the platform.

The 24-hour rule (important!)

WhatsApp distinguishes two kinds of messages:

• Session messages — free-form text and media, allowed only within 24 hours after the customer last wrote to you.
• Template messages — pre-approved by Meta, required to start a conversation or re-engage after 24 hours.

WeZend enforces this automatically: outside the session window, sends must reference an approved template.

Sending

curl -X POST https://api.wezend.com/v1/messages/send \
  -H "X-API-Key: $WEZEND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "to": "+4512345678", "channel": "whatsapp", "message": "Your order #1042 has shipped 🎉" }'

Media attachments use media_url (upload via POST /v1/media first). Inbound replies appear in Inbox → Conversations and fire your webhooks, so support tools and bots can react in real time.