In-app inbox

Not every message deserves an interruption. The in-app inbox is a message center you embed in your own web app — announcements, feature news and account notices land there and wait until the user logs in.

Why an inbox channel

• Zero fatigue — it never buzzes a phone. Perfect for "nice to know" content that would hurt your push opt-in rate.
• Guaranteed reach — no spam filter, no notification permission needed; every active user sees it.
• A journey step like any other — journeys can deliver to inapp exactly like SMS or email, so "announce in-app, escalate to email if unread after 3 days" is a standard pattern.

Embedding

Fetch messages for the signed-in user from your backend and render them in your own UI:

curl "https://api.wezend.com/v1/inapp/messages?contact_id=c_123" \
  -H "X-API-Key: $WEZEND_API_KEY"

Mark read state back so unread badges stay correct:

curl -X POST https://api.wezend.com/v1/inapp/messages/msg_456/read \
  -H "X-API-Key: $WEZEND_API_KEY"

Sending

Use the universal endpoint with "channel": "inapp", or add an in-app step in a journey. Messages support Markdown, a call-to-action URL and an expiry date (after which they disappear from the inbox on their own).