The new DVR code appears to have done the trick, I'm able to pull the zipped xmltv data. Thank you all for your assistance.

Thank you everyone for the guidance.

- I can confirm that all devices have enabled "Sync with guide server" (which was required before the device would include DeviceAuth in the discover.json).
- From the network perspective, I'm reasonably certain there are no outbound firewall deny rules in place ...

Is EPG data only available to consumer type tuner devices? We have an active DVR subscription specifically for EPG access, but only TECH5-4K units on the most current firmware (20250506). When I visit or curl

https://api.hdhomerun.com/api/xmltv?DeviceAuth=<any_current_device_auth>

It returns a ...