When developing locally, message platforms require access to the Xip server running on your machine in order to transmit user messages.
Here are some options you can use:
Start your Xip server as detailed in Booting Up.
Open up an ngrok tunnel to your Xip server and port (default 5000) like this:
ngrok http 5000. ngrok will output a unique ngrok local tunnel URL to your machine.
When you provide your local ngrok URL to a messaging service, you will have to add
/incoming/<service>. For example:
More details on service specific settings can be found on the GitHub page for each service gem.