Authorize.net 'Test Webhook' port 3000 Error occurred in connecting to the endpoint

[rajankumar]

- My webhook endpoint is HTTPS secured and the app is running at port 3000
- The backend code is Node js.
- endpoint e.g: https://abc.com:3000/notify  (POST)
- When I Hit on Test Webhook I get this error: Error:
An error occured in connecting to the endpoint: https://abc.com:3000/notify 
- I tried port 80, 443 nothing is working
- I am actually able to get 200 Response via POSTMAN
- As soon as request is received, i am immediately returning 200 status

https://i.stack.imgur.com/EO2SP.png 

Spoiler

[Rhys69]

Follow these steps to test webhooks:

1. Open requestbin.com.
2. Click Create Request Bin and log in using Google or GitHub to create a private bin. Alternatively, you can opt for a public bin.
3. Copy the endpoint created for you.
4. Proceed to set up webhooks.