---
title: Voice & TTS
description: Text-to-speech and voice cloning on elizaOS Cloud.
---

# Voice & TTS

Text-to-speech generation and voice cloning capabilities.

<Info>
  **API Key Support:** `/api/v1/voice/*` endpoints support both session-based authentication and API key authentication.
  Legacy `/api/elevenlabs/*` endpoints are session-based only.
</Info>

## Endpoint Patterns

Voice APIs are available at two paths:

| Pattern | Description | Auth | Use Case |
|---------|-------------|------|----------|
| `/api/v1/voice/*` | **Recommended** - Generic, provider-agnostic endpoints | Session or API key | New integrations, programmatic access |
| `/api/elevenlabs/*` | Legacy endpoints (still supported) | Session only | Existing integrations, backwards compatibility |

API key authentication is available only on `/api/v1/voice/*`. Legacy `/api/elevenlabs/*` endpoints require session-based auth and do not accept API keys.

---

## Text to Speech

<div className="api-endpoint">
  <span className="method-badge method-badge-post">POST</span>
  <span className="path">/api/v1/voice/tts</span>
</div>

<Note>
  Legacy path: `/api/elevenlabs/tts` (still supported for backwards compatibility)
</Note>

Convert text to speech audio using premium AI voices.

<Tabs>
  <Tab title="cURL">

```bash
curl -X POST "https://elizacloud.ai/api/v1/voice/tts" \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Hello, this is a test of the text to speech system.",
    "voiceId": "21m00Tcm4TlvDq8ikWAM",
    "modelId": "eleven_multilingual_v2"
  }' \
  --output speech.mp3
```
  </Tab>
  <Tab title="JavaScript">

```javascript
const response = await fetch('https://elizacloud.ai/api/v1/voice/tts', {
  method: 'POST',
  headers: {
    'X-API-Key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    text: 'Hello, this is a test.',
    voiceId: '21m00Tcm4TlvDq8ikWAM',
    modelId: 'eleven_multilingual_v2',
  }),
});

const audioBlob = await response.blob();
const audioUrl = URL.createObjectURL(audioBlob);

```
  </Tab>
  <Tab title="Python">

```python
import requests

response = requests.post(
    'https://elizacloud.ai/api/v1/voice/tts',
    headers={
        'X-API-Key': 'YOUR_API_KEY',
        'Content-Type': 'application/json',
    },
    json={
        'text': 'Hello, this is a test.',
        'voiceId': '21m00Tcm4TlvDq8ikWAM',
        'modelId': 'eleven_multilingual_v2',
    }
)

with open('speech.mp3', 'wb') as f:
    f.write(response.content)
```
  </Tab>
</Tabs>

### Parameters

| Parameter          | Type   | Required | Description                                 |
| ------------------ | ------ | -------- | ------------------------------------------- |
| `text`             | string | ✓        | Text to convert to speech (max 5000 chars)  |
| `voiceId`          | string | ✓        | Voice ID to use (see List Voices)           |
| `modelId`          | string |          | Model ID. Default: `eleven_multilingual_v2` |
| `stability`        | number |          | Voice stability (0-1). Default: 0.5         |
| `similarity_boost` | number |          | Voice similarity (0-1). Default: 0.75       |

### Available Models

| Model                    | Languages | Quality | Speed   |
| ------------------------ | --------- | ------- | ------- |
| `eleven_multilingual_v2` | 29        | Highest | Medium  |
| `eleven_turbo_v2_5`      | 32        | High    | Fast    |
| `eleven_flash_v2_5`      | 32        | High    | Fast    |
| `eleven_v3`              | Multi     | Highest | Medium  |

<Info>
  Voice pricing is refreshed separately from the text/image/video catalogs. TTS
  is billed per character, STT per decoded audio duration, and voice cloning by
  clone tier.
</Info>

### Response

Returns audio data as `audio/mpeg` stream. The `Content-Length` header indicates file size.

---

## Speech to Text

<div className="api-endpoint">
  <span className="method-badge method-badge-post">POST</span>
  <span className="path">/api/v1/voice/stt</span>
</div>

<Note>
  Legacy path: `/api/elevenlabs/stt` (still supported for backwards compatibility)
</Note>

Transcribe audio to text.

### Request

Upload audio as `multipart/form-data`:

```bash
curl -X POST "https://elizacloud.ai/api/v1/voice/stt" \
  -H "X-API-Key: YOUR_API_KEY" \
  -F "audio=@recording.mp3"
```

### Response

Returns JSON with `transcript` and `duration_ms`.

| Field | Type | Description |
|-------|------|-------------|
| `transcript` | string | Transcribed text |
| `duration_ms` | number | Audio duration in milliseconds |

```json
{
  "transcript": "Hello, this is a transcription test.",
  "duration_ms": 3245
}
```

---

## List Voices

<div className="api-endpoint">
  <span className="method-badge method-badge-get">GET</span>
  <span className="path">/api/v1/voice/list</span>
</div>

<Note>
  Legacy path: `/api/elevenlabs/voices/user` (still supported for backwards compatibility)
</Note>

Get your cloned voices with pagination and filtering.

### Query Parameters

| Parameter | Type | Description |
|-----------|------|-------------|
| `includeInactive` | boolean | Include inactive voices (default: false) |
| `cloneType` | string | Filter by `instant` or `professional` |
| `limit` | number | Results per page (default: 50, max: 100) |
| `offset` | number | Pagination offset |

### Response

```json
{
  "success": true,
  "voices": [
    {
      "id": "123e4567-e89b-12d3-a456-426614174000",
      "elevenlabsVoiceId": "xyz789",
      "name": "My Custom Voice",
      "description": "A professional voice clone",
      "cloneType": "instant",
      "sampleCount": 3,
      "usageCount": 150,
      "isActive": true,
      "createdAt": "2024-01-15T10:30:00Z"
    }
  ],
  "total": 5,
  "limit": 50,
  "offset": 0,
  "hasMore": false
}
```

---

## Clone Voice

<div className="api-endpoint">
  <span className="method-badge method-badge-post">POST</span>
  <span className="path">/api/v1/voice/clone</span>
</div>

<Note>
  Legacy path: `/api/elevenlabs/voices/clone` (still supported for backwards compatibility)
</Note>

Create a voice clone from audio samples.

### Request

Upload audio samples as `multipart/form-data`:

```bash
curl -X POST "https://elizacloud.ai/api/v1/voice/clone" \
  -H "X-API-Key: YOUR_API_KEY" \
  -F "name=My Voice" \
  -F "cloneType=instant" \
  -F "file0=@sample1.mp3" \
  -F "file1=@sample2.mp3"
```

### Response

```json
{
  "id": "123e4567-e89b-12d3-a456-426614174000",
  "name": "My Voice",
  "status": "processing"
}
```

<Info>
  **Voice Cloning Tips:** - Provide 1-5 minutes of clear audio for best results
  - Use high-quality recordings with minimal background noise - Speaking clearly
  and at a natural pace produces better clones - Multiple samples in different
  contexts improve voice quality
</Info>

---

## Get Voice

<div className="api-endpoint">
  <span className="method-badge method-badge-get">GET</span>
  <span className="path">/api/v1/voice/{"{id}"}</span>
</div>

<Note>
  Legacy path: `/api/elevenlabs/voices/{id}` (still supported for backwards compatibility)
</Note>

Get details for a specific voice by its internal UUID.

```bash
curl "https://elizacloud.ai/api/v1/voice/123e4567-e89b-12d3-a456-426614174000" \
  -H "X-API-Key: YOUR_API_KEY"
```

---

## Update Voice

<div className="api-endpoint">
  <span className="method-badge method-badge-patch">PATCH</span>
  <span className="path">/api/v1/voice/{"{id}"}</span>
</div>

Update a voice's metadata.

```bash
curl -X PATCH "https://elizacloud.ai/api/v1/voice/123e4567-e89b-12d3-a456-426614174000" \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name": "Updated Voice Name", "isActive": true}'
```

---

## Delete Voice

<div className="api-endpoint">
  <span className="method-badge method-badge-delete">DELETE</span>
  <span className="path">/api/v1/voice/{"{id}"}</span>
</div>

<Note>
  Legacy path: `/api/elevenlabs/voices/{id}` (still supported for backwards compatibility)
</Note>

Delete a cloned voice from your account.

```bash
curl -X DELETE "https://elizacloud.ai/api/v1/voice/123e4567-e89b-12d3-a456-426614174000" \
  -H "X-API-Key: YOUR_API_KEY"
```

### Response

```json
{
  "success": true,
  "message": "Voice deleted successfully"
}
```

---

## Voice Cloning Jobs

<div className="api-endpoint">
  <span className="method-badge method-badge-get">GET</span>
  <span className="path">/api/v1/voice/jobs</span>
</div>

<Note>
  Legacy path: `/api/elevenlabs/voices/jobs` (still supported for backwards compatibility)
</Note>

Check status of active voice cloning jobs.

### Response

```json
{
  "success": true,
  "jobs": [
    {
      "id": "job_xyz789",
      "voiceName": "My Voice",
      "jobType": "instant",
      "status": "processing",
      "progress": 50,
      "createdAt": "2024-01-15T10:30:00Z"
    }
  ],
  "total": 1
}
```

### Status Values

| Status       | Description                          |
| ------------ | ------------------------------------ |
| `pending`    | Job is queued                        |
| `processing` | Voice clone is being generated       |
| `completed`  | Voice is ready to use                |
| `failed`     | Cloning failed (check audio quality) |

---

## Pricing

Voice pricing can vary by provider configuration and clone tier. See
[Billing & Credits](/cloud/billing) and the dashboard/API Explorer for current
rates.

---

## Error Handling

| Code | Error                | Solution                                |
| ---- | -------------------- | --------------------------------------- |
| 400  | Invalid voice ID     | Use a valid voice from List Voices      |
| 400  | Text too long        | Split text into chunks under 5000 chars |
| 402  | Insufficient credits | Add credits to your account             |
| 404  | Voice not found      | Voice may have been deleted             |
| 429  | Rate limited         | Wait and retry                          |