Use Google for TTS

[Eisbaer2]

How can I use Google as a TTS service?

I have a working automation in HA:

service: tts.speak
target:
entity_id: tts.google_en_com
data:
cache: true
media_player_entity_id: media_player.squeezebox_radio
message: TEXT
language: de

Isn't it possible to use this service? I haven't found out how.

[remy]

I'm stuck on this too, this is my config:

tts:
  platform: service
  data:
    service: tts.speak
    target:
      entity_id: tts.google_en_com
    service_data:
      cache: true
      media_player_entity_id: media_player.kitchen_speaker
    message_field: text

But I get the following error:

Failed to perform the action tts/speak. extra keys not allowed @ data['text]