Courier Elemental: An Omni-channel Markup Language for Notifications

Marking up notification emails with HTML out of the 1990s has always been an annoyance, but now notifications need to span across additional channels such as SMS, Slack, Microsoft Teams, mobile push, web push, etc. They also need to accommodate more dynamic use cases like magic login links, multi-language notifications, and location-based alerts that have caused the content formatting challenge to become far more complicated and cumbersome.

For example, if you need to trigger a notification that includes a call-to-action for email, SMS, and Slack, the CTA needs to be an HTML button in email, a plain text link in SMS, and a Slack Block element. This task typically is approached by either creating three separate templates or coding up some if/then statements, both of which get very cumbersome very quickly.

That is why we built Courier Elemental, an omni-channel markup language for notifications. Elemental provides a powerful JSON-based syntax to describe the content of your notification for email, push, chat, or any channel you use to notify users ().

With Courier Elemental, you can customize the look, language, and structure of your notification based on locale, channel, and other more advanced custom logic. Elemental not only makes the tedious parts of notification development simple, but it also enables more dynamic, engaging notification experiences that feel like a natural extension of the core product experience. Let’s take a look at some of the notifications that Courier Elemental enables for the Bat Signal app.

Examples

A simple email notification

{
  "message":{
    "to":{
      "email":"[email protected]"
    },
    "content":{
      "title":"Password Reset!",
      "body":"Hi Bruce, here is your temporary password: {{new_password}}"
    },
    "data":{
      "new_password":"hf73*sh1!hfshjsk"
    },
    "routing":{
      "method":"single",
      "channels":[
        "email"
      ]
    }
  }
}

A multi-channel notification with image and action

{
	"message": {
		"to": {
			"email": "[email protected]"
		},
		"content": {
			"elements": [
				{
					"type": "meta",
					"title": "Citizen in Need"
				},
				{
					"type": "text",
					"content": "Hey Bruce, {{citizen_name}} is in need of assistence!"
				},
				{
					"type": "action",
					"style": "button",
					"content": "Directions",
					"href": "{{directions_to_incident}}"
				},
				{
					"type": "image",
					"src": "{{citizen_image}}",
					"href": "{{citizen_profile}}",
					"align": "center",
					"altText": "{{citizen_name}} Image"
				}
			]
		},
		"data": {
			"citizen_name": "Distressed Damsel",
			"citizen_profile": "www.bat-signal.com/profile/distressed-damsel",
			"citizen_image": "www.bat-signal.com/profile/distressed-damsel/profile.png",
			"directions_to_incident": "//www.google.com/maps/dir/ghct"
		},
		"routing": {
			"method": "all",
			"channels": [
				"email",
				"sms",
				"slack",
				"push"
			]
		}
	}
}

An email notification with conditional content

{
  "message":{
    "to":{
      "email":"{{citizen_email}}"
    },
    "content":{
      "title":"Rescue Feedback Survey",
      "elements":[
        {
          "type":"text",
          "content":"Hi {{citizen_name}}, we're so happy that your rescue was successful! 
          Please complete this survey and tell us how we did.",
          "if":"data.rescue_success === true"
        },
        {
          "type":"text",
          "content":"Hi {{citizen_name}}, we're so sorry that your Batman was not able to provide you 
          with a successful rescue. Please complete this survey and tell us how we did.",
          "if":"data.rescue_success === false"
        },
        {
          "type":"action",
          "style":"link",
          "content":"Complete Survey",
          "href":"{{survey_link}}"
        }
      ]
    },
    "data":{
      "citizen_name":"Distressed Damsel",
      "citizen_email":"[email protected]",
      "survey_link":"//bit.ly/3BFUief"
    },
    "routing":{
      "method":"single",
      "channels":[
        "email"
      ]
    }
  }
}

We've also put together an to show what notifications built with Elemental look like in a real codebase.

What’s next?

This is just the beginning for Courier Elemental. In the coming months, we will be releasing new elements as well as new API functionality to open up even more developer use cases.

One exciting use case that Courier Elemental will be enabling soon is the ability for our customers to embed a custom notification designer in their product for their end-users. Imagine a teaching platform where teachers want to create notifications for students or a CRM for small businesses that wants to enable business owners to notify their customers. This is just one of many new notification use cases that will be coming to Courier in 2022.

If you want to get started building with Courier Elemental today, you only need to do two things.

1. You need a Courier API key which you can (every developer gets 10,000 free sends per month)

   
   

2. Once you have an account, you need to one of the .

   
   

If you’d like to attend a more in-depth technical demo and ask any questions, please and join us next week!