The "subdomain" label is redundant, to the extent it's even accurate -- this is really just the URL we want to display, which may or may not involve a subdomain. Similarly "external". The former `external_api_path_subdomain` was never a path -- it's a host, followed by a path, which together form a scheme-relative URL. I'm not quite convinced that value is actually the right thing in 2 of the 3 places we use it, but fixing that can start by giving an accurate name to the thing we have.
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{!create-stream.md!}
Next, on your {{ settings_html|safe }}, create a bot and note its email and API key.
In Home Assistant, you need to add the notify service to your
configuration.yaml file. This should look something like this:
The api_key parameter should correspond to your bot's key. The stream
parameter is not necessarily required; if not given, it will default to
the homeassistant stream.
And the URL under resource should start with:
{{ api_url }}/v1/external/homeassistant
Finally, you need to configure a trigger for the service by adding
an automation entry in the HomeAssistant configuration.yaml file.
The data object takes at least a message property and an optional
title parameter which will be the conversation topic and which defaults
to homeassistant if not given.
{!congrats.md!}


