developers.home-assistant/docs/intent_firing.md

title
Firing intents

If your code matches the user's speech or text to intents, you can let the intent be handled by Home Assistant. This can be done from inside your own integration, or via the generic Intent handle API.

When you fire an intent, you will get a response back or an error will be raised. It is up to your code to return the result to the user.

HTTP API

When the intent integration is loaded, an HTTP API endpoint is available at /api/intent/handle. You can POST JSON data to it containing an intent name and it's data:

{
  "name": "HassTurnOn",
  "data": {
    "name": "Kitchen Light"
  }
}

Home Assistant integration

Example code to handle an intent in Home Assistant.

from homeassistant.helpers import intent

intent_type = "TurnLightOn"
slots = {"entity": {"value": "Kitchen"}}

try:
    intent_response = await intent.async_handle(
        hass, "example_component", intent_type, slots
    )

except intent.UnknownIntent as err:
    _LOGGER.warning("Received unknown intent %s", intent_type)

except intent.InvalidSlotInfo as err:
    _LOGGER.error("Received invalid slot data: %s", err)

except intent.IntentError:
    _LOGGER.exception("Error handling request for %s", intent_type)

The intent response is an instance of homeassistant.helpers.intent.IntentResponse.

Name	Type	Description
intent	Intent	Instance of intent that triggered response.
speech	Dictionary	Speech responses. Each key is a type. Allowed types are plain and ssml.
reprompt	Dictionary	Reprompt responses. Each key is a type. Allowed types are plain and ssml. This is used to keep the session open when a response is required from the user. In these cases, speech usually is a question.
card	Dictionary	Card responses. Each key is a type.

Speech dictionary values:

Name	Type	Description
speech	String	The text to say
extra_data	Any	Extra information related to this speech.

Reprompt dictionary values:

Name	Type	Description
reprompt	String	The text to say when user takes too long to respond
extra_data	Any	Extra information related to this speech.

Card dictionary values:

Name	Type	Description
title	String	The title of the card
content	Any	The content of the card