> For the complete documentation index, see [llms.txt](https://docs.facephi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.facephi.com/docs.facephi-en/sdks/backend-sdk/voice.md).

# Voice Service

**Facephi Voice Service** It is a Rest API service to which audio files can be sent for processing and the result of the voice recognition process obtained. The service offers a service to register (enroll) a new voice, and another to authenticate a voice.

The product is aimed at speaker verification (speaker verification) and voice liveness detection (voice liveness detection). It is based on the use of a voice template, a string that contains the biometric information of the voice. This voice template can be used to authenticate voices in the future.

Optional JWT authentication can be enabled at startup from `config.json` or through the environment variables `FACEPHI_VOICE_REST_AUTH_*`. When JWT is enabled, `GET /api/v1/version` and `GET /api/v1/health` remain public, while the protected endpoints require a valid JWT. The JWT startup configuration is never exposed through `GET /api/v1/config` nor can it be modified through `POST /api/v1/config`.

The supported audio formats are:

* WAV
* MP3
* Opus/OGG
* AAC
* WMA
* PCM ulaw and mulaw
* FLAC
* ALAC (mov)
* MP4
* AIFF

The main distribution contains the following resources:

* Docker container. The container is available in the FacePhi Docker repository and is based on Ubuntu 24.04. The container includes the service and all the necessary dependencies to run it.
* Online documentation. The documentation is available at the following URL: <https://doc-voice-service.facephi.dev/>