I am implementing instamojo payment method into my website. Can I use a localhost URL as Webhook URL in order to test the process?
['https://Stackoverflow.com/questions/30707256', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/4290253/']
I'm from Instamojo.

You can't use a local URL. This is because a webhook request is a POST request that is made from our server. Therefore, the only URLs that we can make these requests to would be URLs that are publicly available.

For testing purposes, I would recommend using [RequestBin](https://requestbin.com/). You can create a new bin and paste the URL for that bin in the webhook URL field of your Instamojo link. This will give you a link that is accessible by our server and you can inspect the POST requests to this link by appending `?inspect` at the end of the URL.
We can't use localhost or as Webhook URL.If it is used the following error will show "Domain name should not be "localhost" or "127.0.0.1" ". So it must be a live URL.