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Voice changer

Change a voice

POST
/v1/voice-changer

Makes speech sound like one of your saved voices. The audio can be up to 60 minutes long. Returns a job whose result is an AudioResult.

Authorization

bearer
headerAuthorizationBearer <API key>

An API key from Settings, starting vcp_live_.

Header Parameters

Idempotency-Key?string

Optional. Up to 255 characters, scoped to your account and kept for 90 days. Sending the same key with the same body again returns the original job. The same key with a different body is rejected with 409.

Lengthlength <= 255

Request Body

application/json
  1. body
audio_file_id?string

A file_id from POST /v1/uploads. Send this or audio_url.

audio_url?string

An https link to the audio, up to 25 MB. Send this or audio_file_id.

Formaturi
voice*string

A saved voice id or name. Presets cannot be used.

Length1 <= length

Response Body

Accepted. Returns the job.

application/json
  1. response
id*string

Job id.

type*JobType
Value in"speech""voice_design""voice_clone""voice_change""transcription""dub""avatar_video""cut"
status*JobStatus
Value in"queued""running""succeeded""failed""cancelled"
progress*|

From 0 to 1 while an avatar video renders, a dub runs or a video is cut, otherwise null.

Range0 <= value <= 1
result*||||||

The result of a succeeded job, or null. Speech, voice designs and the voice changer give AudioResult, kept for 24 hours after the job finishes, then this is null. Transcriptions give TranscriptionResult. Voice clones give VoiceCloneResult. Avatar videos give AvatarVideoResult, dubs give DubResult and cuts give CutResult, all kept for 24 hours after the job was created.

error*|

Why the job failed, or null.

tokens_charged*|

Tokens billed, or null until billing has run.

Range0 <= value
resource_id*|

The voice id for voice clones, the project id for dubs and cuts, and the video id for avatar videos.

created_at*string

When the job was created.

Formatdate-time
finished_at*|

When the job finished, or null while it runs.

Formatdate-time
Example Request
curl -X POST 'https://api.vcp.name/v1/voice-changer' \  -H 'Content-Type: application/json' \  -d '{  "audio_file_id": "8383fc02-625a-4b71-a226-cbb2d19aaf17",  "voice": "Narrator"}'
Example Response
{  "id": "04bd0571-e2c8-4d5b-a3cc-e56f85773abf",  "type": "voice_change",  "status": "queued",  "progress": null,  "result": null,  "error": null,  "tokens_charged": null,  "resource_id": null,  "created_at": "2026-10-30T00:10:42Z",  "finished_at": null}

Transcribe audio POST

Transcribes audio. Returns a job whose result is a `TranscriptionResult`.

Make an avatar video POST

Makes a video of the person in a photo speaking the audio. Send the audio as `speech_job_id` from POST /v1/speech, or as a WAV of up to 20 seconds. The photo must show one face. Returns a job whose result is an `AvatarVideoResult`.