AWS Polly TTS provider

Voice format: aws.Polly.<Engine>.<VoiceId> Example: aws.Polly.Generative.Lucia The engine can also be parsed from a hyphenated suffix on the voice ID — e.g., Lucia-longform resolves to engine long-form.

Voice Samples

Voice	Language	Gender
`aws.Polly.Danielle-Neural`	en-US	Female
`aws.Polly.Gregory-Neural`	en-US	Male
`aws.Polly.Lucia-Generative`	es-ES	Female

WebSocket

Query Parameters

Parameter	Type	Default	Description
`audio_format`	string	`mp3`	`mp3`, `linear16`, `ogg_vorbis`.
`sample_rate`	integer	—	8000, 16000, 22050, 24000.
`language`	string	—	BCP-47 language code. Passed as `language_code` to Polly.
`text_type`	string	`text`	`text` or `ssml`. Polly supports SSML for fine-grained prosody control.

Voice Settings

Field	Type	Default	Description
`engine`	string	`standard`	`standard`, `neural`, `generative`, `long-form`.
`output_format`	string	—	Any Polly output format.
`sample_rate`	string	—	e.g. `"8000"`, `"16000"`, `"22050"`, `"24000"`. Valid values depend on engine and format.
`lexicon_names`	array	—	Pronunciation lexicon names to apply.
`language_code`	string	—	BCP-47. Overrides `language` query param.
`text_type`	string	`text`	`text` or `ssml`. Overrides query param.

{
  "text": " ",
  "voice_settings": {
    "engine": "generative",
    "output_format": "mp3",
    "sample_rate": "24000"
  }
}

REST API

Fields

Field	Type	Default	Description
`engine`	string	`standard`	`standard`, `neural`, `generative`, `long-form`.
`output_format`	string	—	Polly output format.
`sample_rate`	string	—	Sample rate in Hz.
`lexicon_names`	array	—	Pronunciation lexicon names.
`language_code`	string	—	BCP-47 language code.
`text_type`	string	`text`	`text` or `ssml`.
`output_type`	string	`binary_output`	`binary_output`, `base64_output`, or `audio_id`.

Response

Default (binary_output): chunked audio bytes. Format depends on output_format. With output_type: "base64_output": JSON with base64-encoded audio. With output_type: "audio_id": JSON with an audio_url for deferred retrieval.

WebSocket Streaming

REST API

Providers

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API Reference

For AI Agents

AWS Polly TTS provider

Voice Samples

WebSocket

Query Parameters

Voice Settings

REST API

Fields

Response

​Voice Samples

​WebSocket

​Query Parameters

​Voice Settings

​REST API

​Fields

​Response

Voice Samples

WebSocket

Query Parameters

Voice Settings

REST API

Fields

Response