curl --request POST 'https://api.voicecheap.ai/v1/actions/voices_preview_clone' \
--header "x-api-key: $VOICECHEAP_API_KEY" \
--header 'Content-Type: application/json' \
--data '{"requestId":"284a861a-4da8-4d67-ad48-8123e76c8e91","name":"Studio narrator","samples":[{"fileKey":"uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav"}],"hasPermission":true,"trimToMaxDuration":false,"language":"en"}'
const input = {
requestId: '284a861a-4da8-4d67-ad48-8123e76c8e91',
name: 'Studio narrator',
samples: [
{
fileKey: 'uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav',
},
],
hasPermission: true,
trimToMaxDuration: false,
language: 'en',
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/voices_preview_clone', {
method: 'POST',
headers: {
'x-api-key': process.env.VOICECHEAP_API_KEY,
'Content-Type': 'application/json',
},
body: JSON.stringify(input),
});
const body = await response.json();
if (!response.ok) throw new Error(body.code + ': ' + body.message);
console.log(body);
import os
import requests
response = requests.post(
"https://api.voicecheap.ai/v1/actions/voices_preview_clone",
headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
json={"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91", "name": "Studio narrator", "samples": [{"fileKey": "uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav"}], "hasPermission": True, "trimToMaxDuration": False, "language": "en"},
timeout=120,
)
body = response.json()
if not response.ok:
raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"status": "running",
"pollAction": "action_request_get",
"pollAfterSeconds": 5
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"voicePreviews": [
{
"id": "44444444-4444-4444-8444-444444444444",
"kind": "clone",
"name": "Studio narrator",
"previewUrl": "https://files.example.com/narrator-preview.mp3",
"expiresAt": 1792238400000,
"durationSeconds": 10
}
],
"creationUsage": {
"cloneTrial": {
"limit": 1,
"used": 1,
"remaining": 0
},
"design": {
"limit": 5,
"used": 0,
"remaining": 5,
"resetsAt": 1792195200000
},
"previewExpiresAfterHours": 24
}
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"operation": "voices_preview_clone",
"createdAt": 1792144800000,
"updatedAt": 1792144820000,
"status": "running",
"pollAfterSeconds": 5
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"operation": "voices_preview_clone",
"createdAt": 1792144800000,
"updatedAt": 1792144820000,
"status": "completed",
"resultStored": false,
"message": "The action completed. Retrieve its output from the corresponding history or resource action."
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
Speech voices
Preview a cloned voice
Create a temporary voice clone preview from 1–3 owned audio uploads with explicit permission. Uses the app’s clone trial allowance. Save the selected preview before its expiry to retain it.
POST
/
v1
/
actions
/
voices_preview_clone
curl --request POST 'https://api.voicecheap.ai/v1/actions/voices_preview_clone' \
--header "x-api-key: $VOICECHEAP_API_KEY" \
--header 'Content-Type: application/json' \
--data '{"requestId":"284a861a-4da8-4d67-ad48-8123e76c8e91","name":"Studio narrator","samples":[{"fileKey":"uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav"}],"hasPermission":true,"trimToMaxDuration":false,"language":"en"}'
const input = {
requestId: '284a861a-4da8-4d67-ad48-8123e76c8e91',
name: 'Studio narrator',
samples: [
{
fileKey: 'uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav',
},
],
hasPermission: true,
trimToMaxDuration: false,
language: 'en',
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/voices_preview_clone', {
method: 'POST',
headers: {
'x-api-key': process.env.VOICECHEAP_API_KEY,
'Content-Type': 'application/json',
},
body: JSON.stringify(input),
});
const body = await response.json();
if (!response.ok) throw new Error(body.code + ': ' + body.message);
console.log(body);
import os
import requests
response = requests.post(
"https://api.voicecheap.ai/v1/actions/voices_preview_clone",
headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
json={"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91", "name": "Studio narrator", "samples": [{"fileKey": "uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav"}], "hasPermission": True, "trimToMaxDuration": False, "language": "en"},
timeout=120,
)
body = response.json()
if not response.ok:
raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"status": "running",
"pollAction": "action_request_get",
"pollAfterSeconds": 5
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"voicePreviews": [
{
"id": "44444444-4444-4444-8444-444444444444",
"kind": "clone",
"name": "Studio narrator",
"previewUrl": "https://files.example.com/narrator-preview.mp3",
"expiresAt": 1792238400000,
"durationSeconds": 10
}
],
"creationUsage": {
"cloneTrial": {
"limit": 1,
"used": 1,
"remaining": 0
},
"design": {
"limit": 5,
"used": 0,
"remaining": 5,
"resetsAt": 1792195200000
},
"previewExpiresAfterHours": 24
}
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"operation": "voices_preview_clone",
"createdAt": 1792144800000,
"updatedAt": 1792144820000,
"status": "running",
"pollAfterSeconds": 5
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"operation": "voices_preview_clone",
"createdAt": 1792144800000,
"updatedAt": 1792144820000,
"status": "completed",
"resultStored": false,
"message": "The action completed. Retrieve its output from the corresponding history or resource action."
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
Create a temporary voice clone preview from 1–3 owned audio uploads with explicit permission. Uses the app’s clone trial allowance. Save the selected preview before its expiry to retain it.
Required permissions:
POST https://api.voicecheap.ai/v1/actions/voices_preview_clone
Authentication and permissions
string
required
Send a VoiceCheap API key in this header. Authorization: Bearer with the same API key is also supported. OAuth access tokens are accepted only by
MCP, not by this REST endpoint.
voices:write.
An active paid subscription is required. Permissions do not change team roles, resource ownership, media credits, or plan limits.
Parameters
string
Optional at the transport boundary: the server injects an identifier before validation when omitted. Supply your own stable UUID v4 to recover safely from a lost response.Format: “uuid”. Pattern:
^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$.string
required
Text value.Minimum length: 1. Maximum length: 80.
array
required
List of values. See the complete input schema for its item structure.Minimum items: 1. Maximum items: 3.
boolean
required
Confirm that you have permission to clone the person whose voice is in every sample.Required value: true.
boolean
Boolean value.Default: false.
string
Text value.Maximum length: 35. Pattern:
^[a-z]{2,3}(-[A-Za-z0-9]{2,8})*$.Complete input schema
Complete input schema
The JSON Schema below preserves the exact field names, nested types, defaults, bounds, and accepted values exposed by discovery. Additional cross-field rules are listed in the operation notes.
{
"type": "object",
"properties": {
"requestId": {
"description": "UUID v4 for this action. Reuse the same ID with identical arguments on retries.",
"type": "string",
"format": "uuid",
"pattern": "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$"
},
"name": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"samples": {
"minItems": 1,
"maxItems": 3,
"type": "array",
"items": {
"type": "object",
"properties": {
"fileKey": {
"type": "string",
"minLength": 1,
"maxLength": 1024,
"description": "An uploaded audio fileKey returned by voices_upload_complete for this account."
}
},
"required": ["fileKey"],
"additionalProperties": false
}
},
"hasPermission": {
"type": "boolean",
"const": true,
"description": "Confirm that you have permission to clone the person whose voice is in every sample."
},
"trimToMaxDuration": {
"default": false,
"type": "boolean"
},
"language": {
"type": "string",
"maxLength": 35,
"pattern": "^[a-z]{2,3}(-[A-Za-z0-9]{2,8})*$"
}
},
"required": ["name", "samples", "hasPermission"],
"additionalProperties": false
}
Idempotency
Use a UUID v4 in requestId or the Idempotency-Key HTTP header for each mutation. Reuse the same identifier and identical arguments after a network failure. If both are supplied, they must match. Replaying a saved request does not repeat the operation or charge another monthly call. Failed or interrupted requests are not restarted automatically. Every mutation can return HTTP 202 when a retry finds the same request still running, even when its first execution is normally synchronous. If execution completed but resultStored is false, a retry returns HTTP 200 with saved request state instead of the original result. Retrieve the output through its domain history, result, or download action.Request examples
Replace example resource identifiers and media keys with values returned for your account. Keep the request identifier stable when retrying the same mutation.curl --request POST 'https://api.voicecheap.ai/v1/actions/voices_preview_clone' \
--header "x-api-key: $VOICECHEAP_API_KEY" \
--header 'Content-Type: application/json' \
--data '{"requestId":"284a861a-4da8-4d67-ad48-8123e76c8e91","name":"Studio narrator","samples":[{"fileKey":"uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav"}],"hasPermission":true,"trimToMaxDuration":false,"language":"en"}'
const input = {
requestId: '284a861a-4da8-4d67-ad48-8123e76c8e91',
name: 'Studio narrator',
samples: [
{
fileKey: 'uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav',
},
],
hasPermission: true,
trimToMaxDuration: false,
language: 'en',
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/voices_preview_clone', {
method: 'POST',
headers: {
'x-api-key': process.env.VOICECHEAP_API_KEY,
'Content-Type': 'application/json',
},
body: JSON.stringify(input),
});
const body = await response.json();
if (!response.ok) throw new Error(body.code + ': ' + body.message);
console.log(body);
import os
import requests
response = requests.post(
"https://api.voicecheap.ai/v1/actions/voices_preview_clone",
headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
json={"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91", "name": "Studio narrator", "samples": [{"fileKey": "uploads/example-user/66666666-6666-4666-8666-666666666666-narrator.wav"}], "hasPermission": True, "trimToMaxDuration": False, "language": "en"},
timeout=120,
)
body = response.json()
if not response.ok:
raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)
Response
This operation returns HTTP 202 while running. Save requestId and poll action_request_get with that identifier and the original operation name. Polling states are running, completed, failed, and interrupted. A completed result can point to a separate media job; continue with the operation-specific status or output action. All active unsaved voice previews and updated creation allowances, including the new clone candidate.{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"status": "running",
"pollAction": "action_request_get",
"pollAfterSeconds": 5
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"voicePreviews": [
{
"id": "44444444-4444-4444-8444-444444444444",
"kind": "clone",
"name": "Studio narrator",
"previewUrl": "https://files.example.com/narrator-preview.mp3",
"expiresAt": 1792238400000,
"durationSeconds": 10
}
],
"creationUsage": {
"cloneTrial": {
"limit": 1,
"used": 1,
"remaining": 0
},
"design": {
"limit": 5,
"used": 0,
"remaining": 5,
"resetsAt": 1792195200000
},
"previewExpiresAfterHours": 24
}
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"operation": "voices_preview_clone",
"createdAt": 1792144800000,
"updatedAt": 1792144820000,
"status": "running",
"pollAfterSeconds": 5
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"operation": "voices_preview_clone",
"createdAt": 1792144800000,
"updatedAt": 1792144820000,
"status": "completed",
"resultStored": false,
"message": "The action completed. Retrieve its output from the corresponding history or resource action."
},
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}
Result fields
| Field | Description |
|---|---|
data.voicePreviews | All currently active, unsaved previews for this account, including candidates from earlier requests. |
data.voicePreviews[].id | Preview UUID v4 used by voices_preview_get and voices_save_preview. |
data.voicePreviews[].kind | clone or design. |
data.voicePreviews[].name | Preview display name; designed candidates append a number to the requested name. |
data.voicePreviews[].previewUrl | Temporary playable audio URL. Request a fresh URL with voices_preview_get while the preview remains active. |
data.voicePreviews[].expiresAt | Preview expiry as a Unix timestamp in milliseconds. |
data.voicePreviews[].durationSeconds | Preview audio duration in seconds. |
data.creationUsage.cloneTrial | Lifetime clone preview trial allowance with limit, used, and remaining. |
data.creationUsage.design | Daily voice design allowance with limit, used, remaining, and resetsAt in Unix milliseconds. |
data.creationUsage.previewExpiresAfterHours | Lifetime of an unsaved preview in hours, currently 24. |
Recover and poll this request
Use the same identifier even after a lost connection. If resultStored is false, retrieve the output through the corresponding history, result, or download action. Never start a second generation merely to check progress.curl --request POST 'https://api.voicecheap.ai/v1/actions/action_request_get' \
--header "x-api-key: $VOICECHEAP_API_KEY" \
--header 'Content-Type: application/json' \
--data '{"requestId":"284a861a-4da8-4d67-ad48-8123e76c8e91","operation":"voices_preview_clone"}'
HTTP 200
{
"data": {
"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
"operation": "voices_preview_clone",
"status": "completed",
"createdAt": 1792144800000,
"updatedAt": 1792144820000,
"resultStored": true,
"result": {
"voicePreviews": [
{
"id": "44444444-4444-4444-8444-444444444444",
"kind": "clone",
"name": "Studio narrator",
"previewUrl": "https://files.example.com/narrator-preview.mp3",
"expiresAt": 1792238400000,
"durationSeconds": 10
}
],
"creationUsage": {
"cloneTrial": {
"limit": 1,
"used": 1,
"remaining": 0
},
"design": {
"limit": 5,
"used": 0,
"remaining": 5,
"resetsAt": 1792195200000
},
"previewExpiresAfterHours": 24
}
}
}
}
Operation notes
- Use a UUID v4 requestId for this mutation and reuse it with identical arguments when retrying. Long-running actions first return a running request; this example is the completed handler result available from action_request_get.
- Upload 1–3 owned audio samples and use their completed fileKey values. Supported sample formats are MP3, WAV, M4A, OGG, and Opus; each file must be nonempty and at most 20 MiB (20,971,520 bytes). Remote URLs and other accounts’ uploads are refused.
- Samples must total at least 10 seconds and at most 120 seconds of readable audio. trimToMaxDuration defaults to false; set it to true to proportionally trim samples totaling more than 120 seconds.
- hasPermission must be the JSON boolean true, confirming permission for every sample. A string value such as “true” is rejected.
- name must contain 1–80 trimmed characters. Optional language accepts a 2–3 letter code with optional subtags and a maximum of 35 characters.
- Uses the account’s one lifetime clone preview trial. Creating this preview does not save a reusable TTS voice or occupy a saved voice slot.
- The new clone candidate has kind: clone and lasts 24 hours. Its playback is limited to approximately 10 seconds.
- The response includes all active unsaved previews. Use voices_preview_get to refresh playback, then voices_save_preview to retain the chosen candidate on a paid plan.
- language chooses the preview script when a supported script exists; it is not a request to translate the uploaded sample.
- Speech history and custom voices belong to the authenticated account. Team billing does not grant access to another member’s speech or voices.
Usage
Each successful invocation consumes one monthly API/MCP call. Media credits and the operation’s own generation allowances also apply.Errors
| HTTP status | Code | Meaning or recovery |
|---|---|---|
| 400 | CREDENTIAL_IN_QUERY | Credentials were supplied in an access_token or api_key query parameter. Send credentials in headers. |
| 400 | IDEMPOTENCY_CONFLICT | The Idempotency-Key header and requestId body field must match. |
| 400 | INVALID_REQUEST_ID | Supply a UUID v4 requestId or Idempotency-Key. |
| 400 | VALIDATION_ERROR | The input does not match the action schema; inspect details for field errors. |
| 400 | VOICE_CLONE_INVALID_AUDIO | An uploaded sample has no readable positive audio duration. |
| 400 | VOICE_CLONE_INVALID_FILE_SIZE | A stored sample is empty or exceeds 20 MiB. |
| 400 | VOICE_CLONE_INVALID_FILE_TYPE | A sample is not MP3, WAV, M4A, OGG, or Opus audio. |
| 400 | VOICE_CLONE_SAMPLE_TOO_LONG | The combined samples exceed 120 seconds and trimming was not enabled. |
| 400 | VOICE_CLONE_SAMPLE_TOO_SHORT | The combined samples contain less than 10 seconds of audio. |
| 400 | VOICE_SAMPLE_NOT_OWNED | A sample key is unsafe or does not belong to the authenticated account. |
| 401 | API_KEY_EXPIRED | The API key has expired. |
| 401 | INVALID_API_KEY | Provide a valid, unexpired API key. |
| 401 | INVALID_CREDENTIAL | The Authorization header is malformed or conflicts with x-api-key. |
| 401 | MISSING_CREDENTIAL | No usable header credential was supplied, or it exceeded 4096 characters. |
| 401 | USER_NOT_FOUND | The credential’s account no longer exists. |
| 403 | ACCOUNT_UNAVAILABLE | The acting or billing account is unavailable or being deleted. |
| 403 | AMBIGUOUS_TEAM_API_KEY | The credential’s user belongs to more than one team, so the billing context is ambiguous. |
| 403 | INSUFFICIENT_SCOPE | Grant every required permission or choose another credential. |
| 403 | INTEGRATION_PLAN_UNSUPPORTED | The account’s integration limits could not be verified. |
| 403 | SUBSCRIPTION_REQUIRED | Use an active paid subscription. |
| 403 | TEAM_OWNER_NOT_FOUND | The effective team owner account could not be found. |
| 404 | USER_NOT_FOUND | The authenticated account no longer exists. |
| 404 | VOICE_PREVIEW_NOT_FOUND | The request belongs to another account. |
| 409 | CONCURRENT_ACTION_LIMIT_REACHED | This account already has 10 integration actions running. Poll an existing request before starting another. |
| 409 | IDEMPOTENCY_CONFLICT | Reuse an identifier only with the same operation and arguments. |
| 409 | VOICE_CREATION_IN_PROGRESS | The preview is still being created or account deletion blocks new voice work. |
| 409 | VOICE_CREATION_REQUEST_MISMATCH | This requestId was used for a different voice kind or different settings or samples. |
| 409 | VOICE_TRIAL_LIMIT_REACHED | The account has already used its lifetime clone preview trial. |
| 410 | VOICE_PREVIEW_EXPIRED | The request’s voice preview is expired or no longer available. |
| 429 | INTEGRATION_MONTHLY_LIMIT_REACHED | Wait for the monthly reset or change plan. |
| 429 | INTEGRATION_RATE_LIMIT_REACHED | Wait for Retry-After when present and use backoff. |
| 500 | INTERNAL_ERROR | Check saved request state and resource history before deciding to retry a mutation. |
| 502 | INTERNAL_ERROR | The action could not be completed or its outcome could not be confirmed. Inspect request status and resource history before starting another generation. |
| 503 | ACTION_RESULT_UNAVAILABLE | The action ran but its result could not be saved. Inspect saved request state and resource history before starting a new generation. |
| 503 | SERVER_RESTARTING | The server is restarting. Retry shortly and keep the same request identifier for a mutation. |
{
"code": "INSUFFICIENT_SCOPE",
"message": "This credential does not permit the requested action.",
"status": 403,
"details": {
"requiredScopes": ["voices:write"]
}
}
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