ElevenLabs SDK-compatible streaming-input TTS (WebSocket)

Streams text into TTS with the ElevenLabs WebSocket protocol. Use it to start generating audio before all of the text is available. The request must include `Upgrade: websocket`. **Client → server** frames (JSON): - `{ "text": " ", "voice_settings": { "speed": 1.0 }, "generation_config": {...} }` — optional init frame (single space). See the `VoiceSettings` schema for the supported keys; `speed` is honored across providers. - `{ "text": "Hello ", "try_trigger_generation": true }` — append text. - `{ "text": "world.", "flush": true }` — append and force generation. - `{ "text": "", "flush": true }` — flush without closing. - `{ "text": "" }` — close the stream. **Server → client** frames (JSON): - `{ "audio": "<base64 bytes>" }` — one frame per audio chunk. - `{ "audio": null, "error": "<code>", "code": "<status>" }` — error. Text is buffered by default to improve prosody across message boundaries. Two ElevenLabs-only options control buffering: - `auto_mode` (query param) — disables buffering; audio is generated per message rather than across the buffer. - `generation_config.chunk_length_schedule` (init-frame field) — tunes the buffer size, e.g. the init frame `{ "text": " ", "generation_config": { "chunk_length_schedule": [50] } }`. The `try_trigger_generation` and `flush` fields are supported by ElevenLabs, Deepgram, Grok, and Fish. MiniMax does not support mid-stream flushing. Deepgram WebSocket TTS supports only `pcm_*` and `ulaw_*`. Requesting `mp3_*` returns `400 invalid_output_format`. Use `provider_options` for provider-specific settings. You can also pass supported options directly as query parameters. If both forms set the same option, `provider_options[<name>]=<value>` takes precedence. Recognized enum and boolean option values are case-insensitive and are normalized to each provider's wire spelling; free-form values such as prompts, keyterms, and voice IDs retain their original case. The message-level protocol is documented at [the realtime WebSocket reference](/realtime-reference) (AsyncAPI spec: [/asyncapi.yaml](/asyncapi.yaml)).

import WebSocket from "ws";const ws = new WebSocket("wss://api.allmodels.io/el/v1/text-to-speech/eve/stream-input?model_id=grok/grok-tts&output_format=mp3_44100_128", {  headers: { Authorization: `Bearer ${process.env.ALLMODELS_API_KEY}` }});ws.on("open", () => {  ws.send(JSON.stringify({ text: "Hello from AllModels", flush: true }));});ws.on("message", (data, isBinary) => {  if (isBinary) process.stdout.write(data);  else console.log(JSON.parse(data.toString()));});ws.on("error", console.error);

import asyncioimport jsonimport osimport websocketsasync def main():    async with websockets.connect(        "wss://api.allmodels.io/el/v1/text-to-speech/eve/stream-input?model_id=grok/grok-tts&output_format=mp3_44100_128",        additional_headers={"Authorization": f"Bearer {os.environ['ALLMODELS_API_KEY']}"},    ) as socket:        await socket.send(json.dumps({"text": "Hello from AllModels", "flush": True}))        async for message in socket:            print(message if isinstance(message, str) else f"{len(message)} audio bytes")asyncio.run(main())

curl --http1.1 -i "https://api.allmodels.io/el/v1/text-to-speech/eve/stream-input?model_id=grok/grok-tts&output_format=mp3_44100_128" \  -H "Authorization: Bearer $ALLMODELS_API_KEY" \  -H "Connection: Upgrade" \  -H "Upgrade: websocket" \  -H "Sec-WebSocket-Version: 13" \  -H "Sec-WebSocket-Key: SGVsbG9BbGxNb2RlbHMhIQ=="

import osfrom elevenlabs.client import ElevenLabsclient = ElevenLabs(    api_key=os.environ["ALLMODELS_API_KEY"],    base_url="https://api.allmodels.io/el",)chunks = client.text_to_speech.convert_realtime(    "pNInz6obpgDQGcFmaJgB",    text=iter(["Hello from AllModels"]),    model_id="elevenlabs/eleven-turbo-v2-5",    output_format="mp3_44100_128",)with open("speech.mp3", "wb") as output:    for chunk in chunks:        output.write(chunk)

{  "detail": {    "message": "Deepgram TTS WS only supports pcm_*/ulaw_* output formats.",    "status": "invalid_output_format",    "provider": "deepgram",    "output_format": "mp3_44100_128"  }}

{  "error": "missing_api_key"}

{  "detail": {    "loc": [      "body",      "text"    ],    "msg": "field required",    "type": "value_error.missing"  }}

{  "detail": {    "message": "websocket upgrade required",    "status": "websocket_upgrade_required"  }}

{  "detail": {    "message": "authentication was not initialized",    "status": "auth_not_initialized"  }}