I was using the following API
/api/v1/reports/raw/incidents.csv?since=<>&until=<>&filters[urgency]=all&time_zone=America%2FLos_Angeles
Suddenly it stopped working. Please let me know the reason and also if there is any other alternative.
I like to have the same output format as I have some dependency on that one.
This behaviour is due to the launch of the new Insights and the Analytics API. The legacy Reports, including all the /reports endpoints, have been discontinued on December 11, 2023.
You can check the list of Analytics API endpoints on the API Reference page.
It is recommend transitioning to Insights Reports to benefit from their advanced features. Learn more here.
Learn more:
Senior Product Manager Anojan Gunasekaran chats about what’s new in PagerDuty’s Analytics
Hope that helps! 
Thanks Xenda Amici
But I don’t find the assigned_to_user_names in the new Insight. That is the reason I am searching. This assigned_to_user_names will have all the users to whom the incident is assigned across its life span.
Say If this is assigned to A first and then B and then C
My assigned_to_user_names will be A;B;C
Do we have something similar to that one.
@j.prasanna.venkatesan, we have an API endpoint that would return the users requested and their responses for an incident. There’s also the ability to sort the responses (e.g. by the requested_at timestamp).
It doesn’t quite return the information in the format that specified, but the information is the closest to what you want to see.
Please have in mind that this information is not in realtime.