Courier enables developers to manage user notifications across multiple channels like Twitch streams using a no-code templating system. It integrates with services like Discord to send notifications using a single line of code. Developers can use Courier's logs and metrics to track engagement and send Twitch notifications based on events using a Glitch app to handle webhook requests from Twitch.

1. Never miss your favorite
Twitch stream using Courier

2. Proprietary and confidential 2021
Presentation Name
2
Courier enables developers to
manage their user notifications,
across every channel.

3. Proprietary and confidential 2021
Presentation Name
3
The Courier approach

4. All of your channels
Proprietary and confidential 2021
Presentation Name
4

5. Proprietary and confidential 2021
Presentation Name
5
No-Code Templating
No-Code
Code

6. For every channel...
Proprietary and confidential 2021
Presentation Name
6

7. Powerful rules
Proprietary and confidential 2021
Presentation Name
7

8. Proprietary and confidential 2021
Presentation Name
8
One line of code
● Check user preferences
● Check your own default rules
● Find the appropriate template for any channel
● Select the relevant API
● Check your logs to avoid re-sending the same
notification

9. Detailed Logs and Metrics
Proprietary and confidential 2021
Presentation Name
9
● Track engagement by channel
● Powerful filters
● Access via API

10. Proprietary and confidential 2021
Presentation Name
10
Sending notifications
based on Twitch Events

11. Overview
Proprietary and confidential 2021
Presentation Name
11

12. Remix the Glitch App
Proprietary and confidential 2021
Presentation Name
12
https://glitch.com/edit/#!/courier-twitch-eventsub
The Glitch App is a Node.js with Express.js application to connect events send
from Twitch to Courier.
We'll be using a Glitch App to handle the following:
● Accepting POSTs from Twitch EventSub
● Query the Twitch API for more details
● Call the Courier List Send with stream details

13. Twitch Application
Proprietary and confidential 2021
Presentation Name
13
For this project, we'll be using the Twitch API and
EventSub. This requires us to create a Twitch
Application. We can use the Twitch Developer Console
to do this.
https://dev.twitch.tv/console
● Register Your Application
○ Add http://localhost:3000 as a redirect URL
○ Save Client ID and Secret somewhere safe
● Update the environment variables in the .env file
in your Glitch App
○ TWITCH_CLIENT_ID
○ TWITCH_CLIENT_SECRET
○ TWITCH_SIGNING_SECRET

14. Sign up for Courier
Proprietary and confidential 2021
Presentation Name
14
Sign up for a free Developer Account
https://courier.com/hackabull
Go through the Quickstart and send your
first email.

15. Setup Discord
Proprietary and confidential 2021
Presentation Name
15
Courier integrations with many providers. For this
workshop we'll be using Discord. Setting up the
Discord integration allows Courier to send
message on behalf of a Discord Bot.
For this workshop, we'll all use the Courier Bot installed in
the Hackabull Discord Server.
Use the following Bot Token in your Discord Integration:
ODE5NjUzNTIyOTAyNjE0MDI2.YEpv1A.r9aPF8mF8YO
F4D7hzxDt0g1BkKg
You can learn more about what is needed to create your
own Discord Bot in the Courier Documentation.
https://docs.courier.com/docs/discord

16. Create a Courier Notification
Proprietary and confidential 2021
Presentation Name
16
Now we can create a new notification
using the Discord Provider.
We can create a new test event and
preview our notification using data our
Glitch App will pass to Courier.
We'll want to map the notification to the
TWITCH_ONLINE event.
We'll want to update the
COURIER_AUTH_TOKEN variable in .env in the
Gitch App.

17. Setup your List
Proprietary and confidential 2021
Presentation Name
17
1. Create Recipient 2. Subscribe to List
We'll create a Recipient Profile to allow you to
direct message yourself on Discord.
Learn more about the Discord integration at
https://docs.courier.com/docs/discord
You can add multiple channel destinations to your
notification like SMS, Email, Mobile Push and subscribe
more recipients to be notified at the same time.
We'll be sending to a list so will need to add a recipient.

18. Test using Twitch CLI
Proprietary and confidential 2021
Presentation Name
18
We can use the Twitch CLI to simulate a stream.online EventSub event.
https://github.com/twitchdev/twitch-cli
1. Get Broadcaster ID
1. Configure the CLI
twitch configure
2. Fetch an access token
twitch token
3. Get user by login
twitch api get users -q login=trycourier
2. Trigger Event
twitch event trigger streamup
--to-user YOUR_BROADCASTER_ID
-F https://EXTERNAL_URL/webhook/callback
-s YOUR_SECRET

19. Create the EventSub subscription
Proprietary and confidential 2021
Presentation Name
19
Now we can subscribe to the stream.online EventSub event so
we'll receive it every time the broadcaster goes online.
twitch api post eventsub/subscriptions -b '{
"type": "stream.online",
"version": "1",
"condition": {
"broadcaster_user_id": "YOUR_BROADCASTER_ID"
},
"transport": {
"method": "webhook",
"callback": "https://EXTERNAL_URL/webhook/callback",
"secret": "YOUR_SECRET"
}
}'

20. Resources
Proprietary and confidential 2021
Presentation Name
20
● Courier - http://courier.com
● Courier Discord Integration - https://docs.courier.com/docs/discord
● Twitch EventSub - https://dev.twitch.tv/docs/eventsub
● Twitch CLI - https://github.com/twitchdev/twitch-cli
● Courier Twitch EventSub Glitch App - https://glitch.com/edit/#!/courier-twitch-eventsub
● Discord.js - https://discord.js.org
● Twitch API - https://dev.twitch.tv/docs/api
● Twitch Notifications using Courier Blog Series -
https://dev.to/courier/twitch-notifications-part-one-how-to-handle-real-time-events-from-
twitch-1a1

21. Proprietary and confidential 2021
Presentation Name
21
Thank you

22. Slide Title
Proprietary and confidential 2021
Presentation Name
22

26. 26

27. Proprietary and confidential 2021
Presentation Name
27

28. Proprietary and confidential 2021
Presentation Name
28

29. Proprietary and confidential 2021
Presentation Name
29

30. Proprietary and confidential 2021
Presentation Name
30

31. Proprietary and confidential 2021
Presentation Name
31