How to send the Deep Link using Remote API?

To send a push notification that opens a deep link, pass the deep link in the link parameter of your request and disable link shortening with minimize_link:

{
  "request": {
    "application": "XXXXX-XXXXX",
    "auth": "YOUR_API_TOKEN",
    "notifications": [
      {
        "send_date": "now",
        "content": "Check out our new collection",
        "link": "myapp://products/42",
        "minimize_link": 0
      }
    ]
  }
}

• link — the deep link to open. Use your app's own URI scheme (for example myapp://products/42) or a deep link you configured in Settings → Deep Links. A plain https:// address here opens the browser, not your app, unless it is registered as an App Link / Universal Link.
• minimize_link — controls URL shortening. The default is 2 (shorten via bitly), which breaks custom-scheme deep links, so you must set it to 0 whenever the link value is a deep link. Note that shorteners also have call-rate restrictions.

Important! A deep link will not work correctly without "minimize_link": 0.

Before sending, make sure the deep link is actually handled on the device — the URI scheme (or App Link / Universal Link) must be declared in the app and routed to the right screen. See Deep linking.

The example above uses the /createMessage endpoint of the Messages API. For new integrations consider Messaging API v2, which is the current sending API.