OpenAI-compatible audio API

Lokutor answers OpenAI’s two audio endpoints, so tools that support an OpenAI-compatible speech provider work with Lokutor by pointing them at https://api.lokutor.com/v1 with your Lokutor API key.

OpenAI endpoint	Lokutor	Notes
`POST /v1/audio/speech`	text to speech	JSON `{model, input, voice, speed}`
`POST /v1/audio/transcriptions`	speech to text	multipart `file`, optional `language`

Billing, limits and errors are those of the underlying endpoints, at the published rates.

Text to speech

curl https://api.lokutor.com/v1/audio/speech \
  -H "Authorization: Bearer $LOKUTOR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "tts-1", "input": "Hello from Lokutor.", "voice": "alloy"}' \
  --output hello.wav

model is accepted and ignored: every request uses Versa 2.0.
voice takes OpenAI’s names, mapped to Lokutor voices (alloy→F1, nova→F2, shimmer→F3, coral→F4, sage→F5, echo→M1, onyx→M2, fable→M3, ash→M4, ballad→M5), or any Lokutor voice directly (F1, es_f3, a cloned voice id).
language is a Lokutor extra field (en, es, ca, gl, eu, pt, fr, it, de); without it the text decides.
The audio is always WAV, whatever response_format asks for. Clients that play the file or hand it to an audio element work; a client that insists on MP3 bytes does not.

Speech to text

curl https://api.lokutor.com/v1/audio/transcriptions \
  -H "Authorization: Bearer $LOKUTOR_API_KEY" \
  -F [email protected] -F model=whisper-1 -F language=es

response_format can be json (default, {"text": ...}), text, or verbose_json (adds language, duration and per-word times). srt and vtt are not supported. WAV audio only, as in the speech-to-text API.

OpenAI SDK

from openai import OpenAI

client = OpenAI(base_url="https://api.lokutor.com/v1", api_key="your_lokutor_key")
with client.audio.speech.with_streaming_response.create(model="tts-1", voice="alloy", input="Hello") as r:
    r.stream_to_file("hello.wav")
text = client.audio.transcriptions.create(model="whisper-1", file=open("hello.wav", "rb")).text

Open WebUI, LiteLLM and others

In Open WebUI’s Admin → Settings → Audio, choose the OpenAI engine for both text to speech and speech to text, set the base URL to https://api.lokutor.com/v1, paste your key, and give the voice (alloy or a Lokutor voice). In LiteLLM, use the openai/ prefix with api_base="https://api.lokutor.com/v1".

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OpenAI-compatible audio API

Text to speech

Speech to text

OpenAI SDK

Open WebUI, LiteLLM and others

​Text to speech

​Speech to text

​OpenAI SDK

​Open WebUI, LiteLLM and others

Text to speech

Speech to text

OpenAI SDK

Open WebUI, LiteLLM and others