---
type: AI Model
id: inworld
title: Inworld TTS API
provider: Inworld
description: "Low-latency speech from Inworld, built for live voice agents. Supports inline direction such as [whisper] or [say excitedly] written straight into the text."
resource: https://www.pixazo.ai/models/inworld
docs_url: https://www.pixazo.ai/models/inworld
latest_version: TTS 2
tags:
  - text-to-speech
  - inworld
variants:
  - id: inworld-tts-2
    name: Inworld TTS 2
    version: TTS 2
    capabilities:
      - Text to Speech
  - id: inworld-tts-1-5-max
    name: Inworld TTS 1.5 Max
    version: 1.5 Max
    capabilities:
      - Text to Speech
  - id: inworld-tts-1-5-mini
    name: Inworld TTS 1.5 Mini
    version: 1.5 Mini
    capabilities:
      - Text to Speech
timestamp: 2026-08-24T04:16:36.558Z
---

# Inworld TTS API

> Provider: **Inworld**
> Source: https://www.pixazo.ai/models/inworld

Low-latency speech from Inworld, built for live voice agents. Supports inline direction such as [whisper] or [say excitedly] written straight into the text.

## Inworld TTS 2

### Text to Speech

## Inworld TTS 2 API Documentation

Inworld's flagship voice model, with 90+ voices and inline direction — write \[whisper\] or \[say excitedly\] straight into the text. Asynchronous: submit returns a `request_id`; poll the status endpoint until the request is `COMPLETED`, then download the audio.

```
POST https://gateway.pixazo.ai/inworld-tts-2/v1/text-to-speech
```

## Authentication

All requests require an API key passed via header.

Header

Type

Required

Description

Ocp-Apim-Subscription-Key

string

Yes

Your API subscription key

## Text to Speech - Inworld TTS 2

## Request Code

HTTP Python JavaScript cURL

```
POST https://gateway.pixazo.ai/inworld-tts-2/v1/text-to-speech
Content-Type: application/json
Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY

{
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}
```

```
import requests

url = "https://gateway.pixazo.ai/inworld-tts-2/v1/text-to-speech"
headers = {
    "Content-Type": "application/json",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
}
data = {
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}

resp = requests.post(url, json=data, headers=headers)
print(resp.json())
```

```
const res = await fetch("https://gateway.pixazo.ai/inworld-tts-2/v1/text-to-speech", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
  },
  body: JSON.stringify({
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
})
});
console.log(await res.json());
```

```
curl -X POST 'https://gateway.pixazo.ai/inworld-tts-2/v1/text-to-speech' \
  -H 'Content-Type: application/json' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY' \
  --data-raw '{"text": "Hello from Pixazo. This is a text to speech demo.", "voice_id": "Dennis"}'
```

## Output

```
{
  "request_id": "inworld-tts-2_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/inworld-tts-2_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

[Try Now](https://api.pixazo.ai/api-details#api=inworld-tts-2&operation=text-to-speech)

## Webhook (Optional)

Instead of polling, you can receive a Webhook callback when the request reaches a terminal state. Provide a Webhook URL via header on the submit request.

Header

Required

Description

X-Webhook-URL

To enable

HTTPS URL to receive the Webhook callback.

X-Webhook-Mode

No

`terminal` (default, one callback on COMPLETED/ERROR) or `sync` (per-poll callbacks).

### Example: enable Webhook

```
curl -X POST 'https://gateway.pixazo.ai/inworld-tts-2/v1/text-to-speech' \
  -H 'Content-Type: application/json' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY' \
  -H 'X-Webhook-URL: https://your-server.com/webhook' \
  --data-raw '{"text": "Hello from Pixazo. This is a text to speech demo.", "voice_id": "Dennis"}'
```

### Callback Payload (success)

```
{
  "request_id": "inworld-tts-2_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "inworld-tts-2",
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/{request_id}/output.mp3"
    ],
    "media_type": "audio/mpeg"
  },
  "created_at": "2026-08-01T09:14:16.102Z",
  "completed_at": "2026-08-01T09:14:22.870Z"
}
```

### Failure callback shape

```
{
  "request_id": "inworld-tts-2_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "inworld-tts-2",
  "error": "Description of the failure"
}
```

#### Delivery semantics

-   **terminal** mode: one Webhook callback when the request is COMPLETED or ERROR.
-   **sync** mode: a Webhook callback on each status change.
-   Callbacks are idempotent on `request_id` — de-duplicate on it.
-   Respond `200` within a few seconds; the Webhook endpoint must be HTTPS.

## Request Parameters

Parameter

Required

Type

Default

Allowed values / range

Description

`text`

Yes

string

—

up to 2,000 characters

The text to speak. Note this limit is tighter than most models — split longer copy into several requests.

`voice_id`

Yes

string

—

e.g. `Dennis`, `Loretta`, `Hank`

Which Inworld voice to use.

`output_format`

No

string

`mp3`

`mp3`, `opus`, `wav`, `flac`

Output container.

`temperature`

No

number

`1.1`

0.01 – 2

Higher values give more expressive, more variable delivery; lower values are flatter and more consistent.

`speaking_rate`

No

number

`1`

0.5 – 1.5

Speed multiplier.

`timestamp_type`

No

string

`none`

`none`, `word`, `character`

Request word- or character-level timings alongside the audio.

### Voices

90+ voices across 15 production languages.

## Example Request

```
{
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}
```

## Example Response

```
{
  "request_id": "inworld-tts-2_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/inworld-tts-2_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

## Request Headers

Header

Required

Description

Content-Type

Yes

`application/json`

Ocp-Apim-Subscription-Key

Yes

Your API subscription key.

X-Webhook-URL

No

Enable Webhook callbacks (see Webhook section).

## Response Handling

Status Code

Meaning

202

Accepted — request queued; returns `request_id` and `polling_url`.

400

Bad request — a missing or out-of-range parameter. The message names the field.

401

Unauthorized — missing or invalid subscription key.

402

Insufficient balance.

429

Too many requests.

500

Internal server error.

## Retrieving Results

Poll the status endpoint with the `request_id` from the submit response until `status` is `COMPLETED` (or `ERROR`), then download `output.media_url`.

```
curl 'https://gateway.pixazo.ai/v2/requests/status/inworld-tts-2_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY'
```

### Completed response

```
{
  "request_id": "inworld-tts-2_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "inworld-tts-2",
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/{request_id}/output.mp3"
    ],
    "media_type": "audio/mpeg"
  },
  "created_at": "2026-08-01T09:14:16.102Z",
  "completed_at": "2026-08-01T09:14:22.870Z"
}
```

## Response Fields

Field

Type

Description

request\_id

string

Unique request identifier.

status

string

QUEUED, PROCESSING, COMPLETED or ERROR.

model\_id

string

The model that handled the request.

output.media\_url

array

URL of the generated audio file.

output.media\_type

string

MIME type of the audio.

created\_at

string

Request creation timestamp.

completed\_at

string

Completion timestamp.

error

string

Error message when `status` is ERROR.

## Status Values & Flow

`QUEUED` → `PROCESSING` → `COMPLETED` (success) or `ERROR` (failure).

### Pricing

Billed at **$0.025 per 1,000 characters** of input text, rounded up to the next whole 1,000. You are charged for the text you submit, not the length of the audio produced.

Input text

Billed blocks

Cost

A short sentence (~50 characters)

1

$0.025

A paragraph (~800 characters)

1

$0.025

A 3,000-character article

3

$0.075

10,000 characters

10

$0.25

Failed requests are not billed.

## Inworld TTS 1.5 Max

### Text to Speech

## Inworld TTS 1.5 Max API Documentation

The stability-focused Inworld tier: sub-250ms latency with the steadiest delivery of the 1.5 line. Asynchronous: submit returns a `request_id`; poll the status endpoint until the request is `COMPLETED`, then download the audio.

```
POST https://gateway.pixazo.ai/inworld-tts-1-5-max/v1/text-to-speech
```

## Authentication

All requests require an API key passed via header.

Header

Type

Required

Description

Ocp-Apim-Subscription-Key

string

Yes

Your API subscription key

## Text to Speech - Inworld TTS 1.5 Max

## Request Code

HTTP Python JavaScript cURL

```
POST https://gateway.pixazo.ai/inworld-tts-1-5-max/v1/text-to-speech
Content-Type: application/json
Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY

{
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}
```

```
import requests

url = "https://gateway.pixazo.ai/inworld-tts-1-5-max/v1/text-to-speech"
headers = {
    "Content-Type": "application/json",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
}
data = {
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}

resp = requests.post(url, json=data, headers=headers)
print(resp.json())
```

```
const res = await fetch("https://gateway.pixazo.ai/inworld-tts-1-5-max/v1/text-to-speech", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
  },
  body: JSON.stringify({
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
})
});
console.log(await res.json());
```

```
curl -X POST 'https://gateway.pixazo.ai/inworld-tts-1-5-max/v1/text-to-speech' \
  -H 'Content-Type: application/json' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY' \
  --data-raw '{"text": "Hello from Pixazo. This is a text to speech demo.", "voice_id": "Dennis"}'
```

## Output

```
{
  "request_id": "inworld-tts-1-5-max_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/inworld-tts-1-5-max_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

[Try Now](https://api.pixazo.ai/api-details#api=inworld-tts-1-5-max&operation=text-to-speech)

## Webhook (Optional)

Instead of polling, you can receive a Webhook callback when the request reaches a terminal state. Provide a Webhook URL via header on the submit request.

Header

Required

Description

X-Webhook-URL

To enable

HTTPS URL to receive the Webhook callback.

X-Webhook-Mode

No

`terminal` (default, one callback on COMPLETED/ERROR) or `sync` (per-poll callbacks).

### Example: enable Webhook

```
curl -X POST 'https://gateway.pixazo.ai/inworld-tts-1-5-max/v1/text-to-speech' \
  -H 'Content-Type: application/json' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY' \
  -H 'X-Webhook-URL: https://your-server.com/webhook' \
  --data-raw '{"text": "Hello from Pixazo. This is a text to speech demo.", "voice_id": "Dennis"}'
```

### Callback Payload (success)

```
{
  "request_id": "inworld-tts-1-5-max_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "inworld-tts-1-5-max",
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/{request_id}/output.mp3"
    ],
    "media_type": "audio/mpeg"
  },
  "created_at": "2026-08-01T09:14:16.102Z",
  "completed_at": "2026-08-01T09:14:22.870Z"
}
```

### Failure callback shape

```
{
  "request_id": "inworld-tts-1-5-max_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "inworld-tts-1-5-max",
  "error": "Description of the failure"
}
```

#### Delivery semantics

-   **terminal** mode: one Webhook callback when the request is COMPLETED or ERROR.
-   **sync** mode: a Webhook callback on each status change.
-   Callbacks are idempotent on `request_id` — de-duplicate on it.
-   Respond `200` within a few seconds; the Webhook endpoint must be HTTPS.

## Request Parameters

Parameter

Required

Type

Default

Allowed values / range

Description

`text`

Yes

string

—

up to 2,000 characters

The text to speak. Note this limit is tighter than most models — split longer copy into several requests.

`voice_id`

Yes

string

—

e.g. `Dennis`, `Loretta`, `Hank`

Which Inworld voice to use.

`output_format`

No

string

`mp3`

`mp3`, `opus`, `wav`, `flac`

Output container.

`temperature`

No

number

`1.1`

0.01 – 2

Higher values give more expressive, more variable delivery; lower values are flatter and more consistent.

`speaking_rate`

No

number

`1`

0.5 – 1.5

Speed multiplier.

`timestamp_type`

No

string

`none`

`none`, `word`, `character`

Request word- or character-level timings alongside the audio.

### Voices

80+ voices across 15 languages.

## Example Request

```
{
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}
```

## Example Response

```
{
  "request_id": "inworld-tts-1-5-max_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/inworld-tts-1-5-max_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

## Request Headers

Header

Required

Description

Content-Type

Yes

`application/json`

Ocp-Apim-Subscription-Key

Yes

Your API subscription key.

X-Webhook-URL

No

Enable Webhook callbacks (see Webhook section).

## Response Handling

Status Code

Meaning

202

Accepted — request queued; returns `request_id` and `polling_url`.

400

Bad request — a missing or out-of-range parameter. The message names the field.

401

Unauthorized — missing or invalid subscription key.

402

Insufficient balance.

429

Too many requests.

500

Internal server error.

## Retrieving Results

Poll the status endpoint with the `request_id` from the submit response until `status` is `COMPLETED` (or `ERROR`), then download `output.media_url`.

```
curl 'https://gateway.pixazo.ai/v2/requests/status/inworld-tts-1-5-max_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY'
```

### Completed response

```
{
  "request_id": "inworld-tts-1-5-max_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "inworld-tts-1-5-max",
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/{request_id}/output.mp3"
    ],
    "media_type": "audio/mpeg"
  },
  "created_at": "2026-08-01T09:14:16.102Z",
  "completed_at": "2026-08-01T09:14:22.870Z"
}
```

## Response Fields

Field

Type

Description

request\_id

string

Unique request identifier.

status

string

QUEUED, PROCESSING, COMPLETED or ERROR.

model\_id

string

The model that handled the request.

output.media\_url

array

URL of the generated audio file.

output.media\_type

string

MIME type of the audio.

created\_at

string

Request creation timestamp.

completed\_at

string

Completion timestamp.

error

string

Error message when `status` is ERROR.

## Status Values & Flow

`QUEUED` → `PROCESSING` → `COMPLETED` (success) or `ERROR` (failure).

### Pricing

Billed at **$0.035 per 1,000 characters** of input text, rounded up to the next whole 1,000. You are charged for the text you submit, not the length of the audio produced.

Input text

Billed blocks

Cost

A short sentence (~50 characters)

1

$0.035

A paragraph (~800 characters)

1

$0.035

A 3,000-character article

3

$0.105

10,000 characters

10

$0.35

Failed requests are not billed.

## Inworld TTS 1.5 Mini

### Text to Speech

## Inworld TTS 1.5 Mini API Documentation

The fastest and cheapest Inworld tier, around 120ms latency — built for live voice agents where responsiveness beats polish. Asynchronous: submit returns a `request_id`; poll the status endpoint until the request is `COMPLETED`, then download the audio.

```
POST https://gateway.pixazo.ai/inworld-tts-1-5-mini/v1/text-to-speech
```

## Authentication

All requests require an API key passed via header.

Header

Type

Required

Description

Ocp-Apim-Subscription-Key

string

Yes

Your API subscription key

## Text to Speech - Inworld TTS 1.5 Mini

## Request Code

HTTP Python JavaScript cURL

```
POST https://gateway.pixazo.ai/inworld-tts-1-5-mini/v1/text-to-speech
Content-Type: application/json
Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY

{
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}
```

```
import requests

url = "https://gateway.pixazo.ai/inworld-tts-1-5-mini/v1/text-to-speech"
headers = {
    "Content-Type": "application/json",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
}
data = {
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}

resp = requests.post(url, json=data, headers=headers)
print(resp.json())
```

```
const res = await fetch("https://gateway.pixazo.ai/inworld-tts-1-5-mini/v1/text-to-speech", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
  },
  body: JSON.stringify({
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
})
});
console.log(await res.json());
```

```
curl -X POST 'https://gateway.pixazo.ai/inworld-tts-1-5-mini/v1/text-to-speech' \
  -H 'Content-Type: application/json' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY' \
  --data-raw '{"text": "Hello from Pixazo. This is a text to speech demo.", "voice_id": "Dennis"}'
```

## Output

```
{
  "request_id": "inworld-tts-1-5-mini_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/inworld-tts-1-5-mini_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

[Try Now](https://api.pixazo.ai/api-details#api=inworld-tts-1-5-mini&operation=text-to-speech)

## Webhook (Optional)

Instead of polling, you can receive a Webhook callback when the request reaches a terminal state. Provide a Webhook URL via header on the submit request.

Header

Required

Description

X-Webhook-URL

To enable

HTTPS URL to receive the Webhook callback.

X-Webhook-Mode

No

`terminal` (default, one callback on COMPLETED/ERROR) or `sync` (per-poll callbacks).

### Example: enable Webhook

```
curl -X POST 'https://gateway.pixazo.ai/inworld-tts-1-5-mini/v1/text-to-speech' \
  -H 'Content-Type: application/json' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY' \
  -H 'X-Webhook-URL: https://your-server.com/webhook' \
  --data-raw '{"text": "Hello from Pixazo. This is a text to speech demo.", "voice_id": "Dennis"}'
```

### Callback Payload (success)

```
{
  "request_id": "inworld-tts-1-5-mini_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "inworld-tts-1-5-mini",
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/{request_id}/output.mp3"
    ],
    "media_type": "audio/mpeg"
  },
  "created_at": "2026-08-01T09:14:16.102Z",
  "completed_at": "2026-08-01T09:14:22.870Z"
}
```

### Failure callback shape

```
{
  "request_id": "inworld-tts-1-5-mini_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "inworld-tts-1-5-mini",
  "error": "Description of the failure"
}
```

#### Delivery semantics

-   **terminal** mode: one Webhook callback when the request is COMPLETED or ERROR.
-   **sync** mode: a Webhook callback on each status change.
-   Callbacks are idempotent on `request_id` — de-duplicate on it.
-   Respond `200` within a few seconds; the Webhook endpoint must be HTTPS.

## Request Parameters

Parameter

Required

Type

Default

Allowed values / range

Description

`text`

Yes

string

—

up to 2,000 characters

The text to speak. Note this limit is tighter than most models — split longer copy into several requests.

`voice_id`

Yes

string

—

e.g. `Dennis`, `Loretta`, `Hank`

Which Inworld voice to use.

`output_format`

No

string

`mp3`

`mp3`, `opus`, `wav`, `flac`

Output container.

`temperature`

No

number

`1.1`

0.01 – 2

Higher values give more expressive, more variable delivery; lower values are flatter and more consistent.

`speaking_rate`

No

number

`1`

0.5 – 1.5

Speed multiplier.

`timestamp_type`

No

string

`none`

`none`, `word`, `character`

Request word- or character-level timings alongside the audio.

### Voices

80+ voices across 15 languages.

## Example Request

```
{
  "text": "Hello from Pixazo. This is a text to speech demo.",
  "voice_id": "Dennis"
}
```

## Example Response

```
{
  "request_id": "inworld-tts-1-5-mini_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/inworld-tts-1-5-mini_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

## Request Headers

Header

Required

Description

Content-Type

Yes

`application/json`

Ocp-Apim-Subscription-Key

Yes

Your API subscription key.

X-Webhook-URL

No

Enable Webhook callbacks (see Webhook section).

## Response Handling

Status Code

Meaning

202

Accepted — request queued; returns `request_id` and `polling_url`.

400

Bad request — a missing or out-of-range parameter. The message names the field.

401

Unauthorized — missing or invalid subscription key.

402

Insufficient balance.

429

Too many requests.

500

Internal server error.

## Retrieving Results

Poll the status endpoint with the `request_id` from the submit response until `status` is `COMPLETED` (or `ERROR`), then download `output.media_url`.

```
curl 'https://gateway.pixazo.ai/v2/requests/status/inworld-tts-1-5-mini_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx' \
  -H 'Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY'
```

### Completed response

```
{
  "request_id": "inworld-tts-1-5-mini_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "inworld-tts-1-5-mini",
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/{request_id}/output.mp3"
    ],
    "media_type": "audio/mpeg"
  },
  "created_at": "2026-08-01T09:14:16.102Z",
  "completed_at": "2026-08-01T09:14:22.870Z"
}
```

## Response Fields

Field

Type

Description

request\_id

string

Unique request identifier.

status

string

QUEUED, PROCESSING, COMPLETED or ERROR.

model\_id

string

The model that handled the request.

output.media\_url

array

URL of the generated audio file.

output.media\_type

string

MIME type of the audio.

created\_at

string

Request creation timestamp.

completed\_at

string

Completion timestamp.

error

string

Error message when `status` is ERROR.

## Status Values & Flow

`QUEUED` → `PROCESSING` → `COMPLETED` (success) or `ERROR` (failure).

### Pricing

Billed at **$0.015 per 1,000 characters** of input text, rounded up to the next whole 1,000. You are charged for the text you submit, not the length of the audio produced.

Input text

Billed blocks

Cost

A short sentence (~50 characters)

1

$0.015

A paragraph (~800 characters)

1

$0.015

A 3,000-character article

3

$0.045

10,000 characters

10

$0.15

Failed requests are not billed.