We just released a new integration error handling mechanism that allows you to display descriptive errors when an integration fails! 
This mechanism helps provide a seamless user experience and makes troubleshooting much easier for both you and your users.
Our framework currently supports two different methods to communicate errors: severity codes and HTTP status codes. Both methods allow you to display text in the event of an error, so users can better understand what caused the error and prevent it from occurring again.
Check out our error handling doc to see examples and read more about each method!