Portainer keeps failing with 'Bad gateway' error | Home Assistant | Page 1

maiden dune Oct 7, 2025, 5:52 AM

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Hello,
Has anyone got the Portainer integration working in 2025.10 update? I'm getting below error:
Failed setup, will retry: An error occurred while trying to connect to the Portainer instance: PortainerConnectionError("Connection error for GET https://192.168.55.99:9443/api/endpoints/6/docker/containers/json?all=1: 502, message='Bad Gateway', url='https://192.168.55.99:9443/api/endpoints/6/docker/containers/json?all=1'")
I've added access token under Admin account and entered 'url' as https://192.168.55.99:9443 with generated access token under 'API token'. Any help would be appreciated!
Thanks!
Portainer integration: https://www.home-assistant.io/integrations/portainer/

Home Assistant

Portainer

Instructions on how to integrate Portainer with Home Assistant.

maiden dune Oct 8, 2025, 5:30 AM

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Anyone got any clue? Thanks!

proven crystal Oct 8, 2025, 10:59 AM

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Does https://192.168.55.99:9443/api/endpoints/6/docker/containers/json actually load?

It sounds like there may be an issue with reaching the portainer server from HA.

maiden dune Oct 9, 2025, 2:47 AM

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proven crystal Does `https://192.168.55.99:9443/api/endpoints/6/docker/containers/json` actuall...

Hi, thanks for the pointer. Yes, it works but with following message:

{
  "message": "A valid authorization token is missing",
  "details": "Unauthorized"
}

#Portainer keeps failing with 'Bad gateway' error