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POST
/
voices
/
v1
/
voices:clone
cURL
curl --location 'https://api.inworld.ai/voices/v1/voices:clone' \
--header "Authorization: Basic $INWORLD_API_KEY" \
--header 'Content-Type: application/json' \
--data '{
  "displayName": "my_voice_clone_demo",
  "langCode": "EN_US",
  "voiceSamples": [
    {
      "audioData": "<base64-audio-data>",
      "transcription": "Hello! This is a short voice sample for cloning."
    }
  ],
  "description": "Voice clone created from provided WAV sample.",
  "tags": ["demo", "clone"],
  "audioProcessingConfig": {
    "removeBackgroundNoise": true
  }
}'
{
  "audioSamplesValidated": [
    {
      "audioData": "<base64-wav-bytes>",
      "errors": [],
      "langCode": "EN_US",
      "transcription": "Hello! This is a short voice sample for cloning.",
      "warnings": []
    }
  ],
  "voice": {
    "voiceId": "your_workspace_id__my_voice_clone_demo_20260218_223134z",
    "langCode": "EN_US",
    "displayName": "my_voice_clone_demo",
    "description": "Voice clone created from provided WAV sample.",
    "tags": [
      "demo",
      "clone"
    ],
    "name": "workspaces/your_workspace_id/voices/my_voice_clone_demo_20260218_223134z",
    "source": "IVC"
  }
}

Documentation Index

Fetch the complete documentation index at: https://docs.inworld.ai/llms.txt

Use this file to discover all available pages before exploring further.

Short URL Path: /workspaces/{workspace} is no longer required in the path for simplicity and clarity. When omitted, the workspace is derived from your API key. The previous URL with the full path /voices/v1/workspaces/{workspace}/voices:clone would continue to be supported.

Authorizations

​
Authorization
string
header
required

Your API key. Read permissions are required for GET endpoints. Write permissions are required for POST, PATCH, and DELETE endpoints.

For Basic authentication, please populate Basic $INWORLD_API_KEY

Body

application/json

Request message for CloneVoice custom method.

​
displayName
string
required

The human-readable name shown anywhere the voice is listed or selected. Keep it short and distinctive so users can find it easily.

​
langCode
enum<string>
required
Available options:
EN_US,
ZH_CN,
KO_KR,
JA_JP,
RU_RU,
AUTO,
IT_IT,
ES_ES,
PT_BR,
DE_DE,
FR_FR,
AR_SA,
PL_PL,
NL_NL,
HI_IN,
HE_IL
​
voiceSamples
object[]
required

Voice samples used for cloning. For best results, provide clear audio and avoid speaking in multiple languages, whispering, or making non-verbal sounds like coughing. Instant voice cloning works best with a 10-15 sec audio clip; longer clips will be cutoff at 15sec, which can affect quality. See Voice Cloning Best Practices for guidance on how to generate a high-quality voice clone.

​
description
string

Longer blurb that explains the voice's tone, accent, use cases, or other relevant attributes. Helpful for search and selection.

​
tags
string[]

Flat list of labels used for filtering, grouping and discovery. Examples could include gender, age or use case.

​
audioProcessingConfig
object

Audio processing config for voice cloning.

Response

A successful response.

Response message for CloneVoice custom method.

​
voice
object

Voice resource representing a voice configuration.

Example:
{
  "voiceId": "your_workspace_id__my_voice_clone_demo_20260218_223134z",
  "langCode": "EN_US",
  "displayName": "John",
  "description": "Cloned voice for narrations.",
  "tags": ["demo", "clone"],
  "name": "workspaces/your_workspace_id/voices/my_voice_clone_demo_20260218_223134z",
  "source": "IVC"
}
​
audioSamplesValidated
object[]

The list of validated samples.