Maybe this is old news, but it's new to me! And changes like this are so rare in my experience.
Just wanted to summarize what I see right now on
https://www.itsmarta.com/app-developer-resources.aspx"ATTENTION!
The MARTA Bus Real-time RESTful API feed will no longer be available after December 13th. It will be replaced with the Google Transit Feed Specification – Real Time (GTFS-RT) feed. Please click on the MARTA Bus GTFS-Real-time section below for details."
So that means this endpoint is going away (today!):
http://developer.itsmarta.com/BRDRestService/RestBusRealTimeService/GetAllBus
And it is being replaced by two new endpoints:
I'm still digging into the new endpoints but so far I think this is exciting news if it means better bus data! I just gotta find time to update my beta UI at
https://marta.io/bus_routes