# GPT Image API

> Provider: **OpenAI**
> Source: https://www.pixazo.ai/models/gpt-image

Advanced image generation by OpenAI.

## GPT Image v1.5

### Text to Image

## Base URL

```
https://gateway.pixazo.ai/gpt-image-1-5-api-923/v1
```

## Authentication

All requests require an API key passed via header.

Header

Type

Required

Description

Ocp-Apim-Subscription-Key

string

Yes

Your API subscription key

## GPT-Image 1.5 API generate request - GPT Image 1.5 API

## Request Code

HTTP Python JavaScript cURL

```
POST https://gateway.pixazo.ai/gpt-image-1-5-api-923/v1/gpt-image-1-5-api-request
Content-Type: application/json
Cache-Control: no-cache
Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY

{
  "prompt": "create a realistic image taken with iphone at these coordinates 41°43′32″N 49°56′49″W 15 April 1912",
  "image_size": "1024x1024",
  "background": "auto",
  "quality": "high",
  "num_images": 1,
  "output_format": "png"
}
```

```
import requests

url = "https://gateway.pixazo.ai/gpt-image-1-5-api-923/v1/gpt-image-1-5-api-request"
headers = {
    "Content-Type": "application/json",
    "Cache-Control": "no-cache",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
}
data = {
    "prompt": "create a realistic image taken with iphone at these coordinates 41°43′32″N 49°56′49″W 15 April 1912",
    "image_size": "1024x1024",
    "background": "auto",
    "quality": "high",
    "num_images": 1,
    "output_format": "png"
}

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

```
const url = 'https://gateway.pixazo.ai/gpt-image-1-5-api-923/v1/gpt-image-1-5-api-request';
const headers = {
  'Content-Type': 'application/json',
  'Cache-Control': 'no-cache',
  'Ocp-Apim-Subscription-Key': 'YOUR_SUBSCRIPTION_KEY'
};
const data = {
  prompt: 'create a realistic image taken with iphone at these coordinates 41°43′32″N 49°56′49″W 15 April 1912',
  image_size: '1024x1024',
  background: 'auto',
  quality: 'high',
  num_images: 1,
  output_format: 'png'
};

fetch(url, {
  method: 'POST',
  headers: headers,
  body: JSON.stringify(data)
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));
```

```
curl -X POST "https://gateway.pixazo.ai/gpt-image-1-5-api-923/v1/gpt-image-1-5-api-request" \
  -H "Content-Type: application/json" \
  -H "Cache-Control: no-cache" \
  -H "Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY" \
  --data-raw '{
    "prompt": "create a realistic image taken with iphone at these coordinates 41°43′32″N 49°56′49″W 15 April 1912",
    "image_size": "1024x1024",
    "background": "auto",
    "quality": "high",
    "num_images": 1,
    "output_format": "png"
  }'
```

## Output

```
{
  "request_id": "gpt-image-1-5-api-923_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/gpt-image-1-5-api-923_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

[Try Now](https://api.pixazo.ai/api-details#api=gpt-image-1-5-api-923&operation=gpt-image-1-5-api-request)

## Webhook (Optional)

Add the `X-Webhook-URL` header to your generate request to receive a POST callback instead of polling.

```
X-Webhook-URL: https://your-server.com/webhook/callback
```

## Request Parameters - GPT-Image 1.5 API generate request

Parameter

Required

Type

Description

prompt

Yes

string

A detailed text description of the desired image. The model interprets this prompt to generate visuals with high fidelity.

image\_size

Optional

string

Dimensions of the generated image. Supports standard aspect ratios.

background

Optional

string

Background handling mode. Use "auto" for intelligent background inference, or specify a color/texture if supported.

quality

Optional

string

Rendering quality level. "high" produces more detailed outputs with longer processing. "standard" is faster but less detailed.

num\_images

Optional

integer

Number of distinct images to generate in a single request.

output\_format

Optional

string

File format of the generated image. Supported formats: "png", "jpeg", "webp".

## Example Request

```
{
  "prompt": "create a realistic image taken with iphone at these coordinates 41°43′32″N 49°56′49″W 15 April 1912",
  "image_size": "1024x1024",
  "background": "auto",
  "quality": "high",
  "num_images": 1,
  "output_format": "png"
}
```

## Response

```
{
  "request_id": "gpt-image-1-5-api-923_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/gpt-image-1-5-api-923_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

## Request Headers

Header

Value

Content-Type

application/json

Cache-Control

no-cache

Ocp-Apim-Subscription-Key

YOUR\_SUBSCRIPTION\_KEY

## Response Handling

Common status codes.

Code

Meaning

202

Accepted — Request queued

400

Bad Request

401

Unauthorized

402

Insufficient Balance

403

Forbidden

429

Too Many Requests

500

Internal Server Error

## Error Responses

Queue system errors and model validation errors.

### Queue System Errors

```
// 402 — Insufficient balance
{
  "error": "Insufficient Balance",
  "message": "Your wallet does not have enough balance."
}
```

```
// 400 — Model not found
{
  "error": "Model not found",
  "message": "Model 'gpt-image-1-5-api-923' not found or is disabled"
}
```

### Error via Status/Webhook

```
{
  "request_id": "gpt-image-1-5-api-923_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "gpt-image-1-5-api-923",
  "error": "Description of the error",
  "output": null
}
```

## Retrieving Results

Poll the universal status endpoint to check progress and retrieve results.

### Endpoint

```
GET https://gateway.pixazo.ai/v2/requests/status/{request_id}
Ocp-Apim-Subscription-Key: YOUR_API_KEY
```

## cURL Example

```
curl -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  "https://gateway.pixazo.ai/v2/requests/status/gpt-image-1-5-api-923_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
```

## Response (Completed)

```
{
  "request_id": "gpt-image-1-5-api-923_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "gpt-image-1-5-api-923",
  "error": null,
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/gpt-image-1-5-api-923_019dxxxx-xxxx/output.ext"
    ],
    "media_type": "application/octet-stream"
  },
  "created_at": "2026-03-31T10:00:00.000Z",
  "updated_at": "2026-03-31T10:00:15.000Z",
  "completed_at": "2026-03-31T10:00:15.000Z"
}
```

## Response Fields

Field

Type

Description

request\_id

string

Unique request identifier

status

string

QUEUED, PROCESSING, COMPLETED, FAILED, or ERROR

model\_id

string

Model that processed the request

error

string|null

Error message if failed

output.media\_url

array

URLs to generated media (R2 CDN)

output.media\_type

string

MIME type of the output

created\_at

string

When request was created

completed\_at

string|null

When request completed

polling\_url

string

Status URL (initial response only)

## Status Values

Status

Description

QUEUED

Request accepted, waiting to be processed

PROCESSING

Being processed by the model

COMPLETED

Done — output contains the result

FAILED

Failed — check error field

ERROR

System error — not charged

## Status Flow

```
QUEUED → PROCESSING → COMPLETED
                    → FAILED
                    → ERROR
```

## Typical Workflow

1.  **Send a generate request** to the API endpoint
2.  **Save the `request_id`** from the response
3.  **Poll** every 5-10 seconds: `GET /v2/requests/status/{request_id}`
4.  **When `status` is `"COMPLETED"`**, download from `output.media_url`

**Tip:** Use `X-Webhook-URL` header to get a callback instead of polling.

## GPT Image 2

### Image to Image (Image Editing)

## Base URL

```
https://gateway.pixazo.ai/gpt-image-2-image-to-image/v1
```

## Authentication

All requests require an API key passed via header.

Header

Type

Required

Description

Ocp-Apim-Subscription-Key

string

Yes

Your API subscription key

## Image to Image - GPT Image 2 Image to Image Api

## Request Code

HTTP Python JavaScript cURL

```
POST https://gateway.pixazo.ai/gpt-image-2-image-to-image/v1/gpt-image-2-image-to-image/generate
Content-Type: application/json
Cache-Control: no-cache
Ocp-Apim-Subscription-Key: YOUR_API_KEY

{
  "prompt": "Transform this into a Studio Ghibli style anime illustration",
  "input_images": ["https://pub-582b7213209642b9b995c96c95a30381.r2.dev/f1.png"]
}
```

```
import requests

url = "https://gateway.pixazo.ai/gpt-image-2-image-to-image/v1/gpt-image-2-image-to-image/generate"
headers = {
    "Content-Type": "application/json",
    "Cache-Control": "no-cache",
    "Ocp-Apim-Subscription-Key": "YOUR_API_KEY"
}
data = {
    "prompt": "Transform this into a Studio Ghibli style anime illustration",
    "input_images": ["https://pub-582b7213209642b9b995c96c95a30381.r2.dev/f1.png"]
}

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

```
const url = 'https://gateway.pixazo.ai/gpt-image-2-image-to-image/v1/gpt-image-2-image-to-image/generate';
const headers = {
  'Content-Type': 'application/json',
  'Cache-Control': 'no-cache',
  'Ocp-Apim-Subscription-Key': 'YOUR_API_KEY'
};
const data = {
  prompt: 'Transform this into a Studio Ghibli style anime illustration',
  input_images: ['https://pub-582b7213209642b9b995c96c95a30381.r2.dev/f1.png']
};

fetch(url, {
  method: 'POST',
  headers: headers,
  body: JSON.stringify(data)
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));
```

```
curl -X POST "https://gateway.pixazo.ai/gpt-image-2-image-to-image/v1/gpt-image-2-image-to-image/generate" \
  -H "Content-Type: application/json" \
  -H "Cache-Control: no-cache" \
  -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  --data-raw '{
    "prompt": "Transform this into a Studio Ghibli style anime illustration",
    "input_images": ["https://pub-582b7213209642b9b995c96c95a30381.r2.dev/f1.png"]
  }'
```

## Output

```
{
  "request_id": "gpt-image-2-image-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/gpt-image-2-image-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

[Try Now](https://api.pixazo.ai/api-details#api=gpt-image-2-image-to-image&operation=image-to-image)

## Webhook (Optional)

Add the `X-Webhook-URL` header to your generate request to receive a POST callback instead of polling.

```
X-Webhook-URL: https://your-server.com/webhook/callback
```

## Request Parameters - Image to Image

Parameter

Required

Type

Default

Allowed values / range

Description

prompt

Yes

string

—

non-empty

Text description of the desired image

input\_images

Yes

array of URI strings

—

≥ 1 URL, each http:// or https://

Publicly accessible reference images used to condition generation

quality

No

string

"auto"

"low", "medium", "high", "auto"

Image quality — higher = slower, more detail

background

No

string

"auto"

"auto", "transparent", "opaque"

Background handling. "transparent" requires output\_format of png or webp

moderation

No

string

"auto"

"auto", "low"

Content moderation level

aspect\_ratio

No

string

"1:1"

"1:1", "3:2", "2:3"

Output aspect ratio (square, landscape, portrait)

output\_format

No

string

"webp"

"png", "jpeg", "webp"

Output file format

number\_of\_images

No

integer

1

1–10

Number of images to generate in one request

output\_compression

No

integer

90

0–100

Compression level for jpeg / webp (no effect on png)

## Example Request (Full)

```
{
  "prompt": "Transform this into a Studio Ghibli style anime illustration",
  "input_images": ["https://pub-582b7213209642b9b995c96c95a30381.r2.dev/f1.png"],
  "quality": "high",
  "background": "auto",
  "moderation": "auto",
  "aspect_ratio": "3:2",
  "output_format": "png",
  "number_of_images": 2,
  "output_compression": 95
}
```

## Response

```
{
  "request_id": "gpt-image-2-image-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/gpt-image-2-image-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

## Request Headers

Header

Value

Content-Type

application/json

Cache-Control

no-cache

Ocp-Apim-Subscription-Key

YOUR\_API\_KEY

## Response Handling

Common status codes.

Code

Meaning

202

Accepted — Request queued

400

Bad Request

401

Unauthorized

402

Insufficient Balance

403

Forbidden

429

Too Many Requests

500

Internal Server Error

## Error Responses

Queue system errors and model validation errors.

### Queue System Errors

```
// 402 — Insufficient balance
{
  "error": "Insufficient Balance",
  "message": "Your wallet does not have enough balance."
}
```

```
// 400 — Model not found
{
  "error": "Model not found",
  "message": "Model 'gpt-image-2-image-to-image' not found or is disabled"
}
```

### Error via Status/Webhook

```
{
  "request_id": "gpt-image-2-image-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "gpt-image-2-image-to-image",
  "error": "Description of the error",
  "output": null
}
```

## Retrieving Results

Poll the universal status endpoint to check progress and retrieve results.

### Endpoint

```
GET https://gateway.pixazo.ai/v2/requests/status/{request_id}
Ocp-Apim-Subscription-Key: YOUR_API_KEY
```

## cURL Example

```
curl -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  "https://gateway.pixazo.ai/v2/requests/status/gpt-image-2-image-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
```

## Response (Completed)

```
{
  "request_id": "gpt-image-2-image-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "gpt-image-2-image-to-image",
  "error": null,
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/gpt-image-2-image-to-image_019dxxxx-xxxx/output.webp"
    ],
    "media_type": "image/webp"
  },
  "created_at": "2026-04-22T10:00:00.000Z",
  "updated_at": "2026-04-22T10:01:30.000Z",
  "completed_at": "2026-04-22T10:01:30.000Z"
}
```

## Response Fields

Field

Type

Description

request\_id

string

Unique request identifier

status

string

QUEUED, PROCESSING, COMPLETED, FAILED, or ERROR

model\_id

string

Model that processed the request

error

string|null

Error message if failed

output.media\_url

array

URLs to generated media (R2 CDN)

output.media\_type

string

MIME type of the output

created\_at

string

When request was created

completed\_at

string|null

When request completed

polling\_url

string

Status URL (initial response only)

## Status Values

Status

Description

QUEUED

Request accepted, waiting to be processed

PROCESSING

Being processed by the model

COMPLETED

Done — output contains the result

FAILED

Failed — check error field

ERROR

System error — not charged

## Status Flow

```
QUEUED → PROCESSING → COMPLETED
                    → FAILED
                    → ERROR
```

## Typical Workflow

1.  **Send a generate request** to the API endpoint
2.  **Save the `request_id`** from the response
3.  **Poll** every 5-10 seconds: `GET /v2/requests/status/{request_id}`
4.  **When `status` is `"COMPLETED"`**, download from `output.media_url`

**Tip:** Use `X-Webhook-URL` header to get a callback instead of polling.

### Text to Image

## Base URL

```
https://gateway.pixazo.ai/gpt-image-2-text-to-image/v1
```

## 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 Image - GPT Image 2 Text to Image Api

## Request Code

HTTP Python JavaScript cURL

```
POST https://gateway.pixazo.ai/gpt-image-2-text-to-image/v1/gpt-image-2-text-to-image/generate
Content-Type: application/json
Cache-Control: no-cache
Ocp-Apim-Subscription-Key: YOUR_API_KEY

{
  "prompt": "A photorealistic portrait of an astronaut on Mars at golden hour"
}
```

```
import requests

url = "https://gateway.pixazo.ai/gpt-image-2-text-to-image/v1/gpt-image-2-text-to-image/generate"
headers = {
    "Content-Type": "application/json",
    "Cache-Control": "no-cache",
    "Ocp-Apim-Subscription-Key": "YOUR_API_KEY"
}
data = {
    "prompt": "A photorealistic portrait of an astronaut on Mars at golden hour"
}

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

```
const url = 'https://gateway.pixazo.ai/gpt-image-2-text-to-image/v1/gpt-image-2-text-to-image/generate';
const headers = {
  'Content-Type': 'application/json',
  'Cache-Control': 'no-cache',
  'Ocp-Apim-Subscription-Key': 'YOUR_API_KEY'
};
const data = {
  prompt: 'A photorealistic portrait of an astronaut on Mars at golden hour'
};

fetch(url, {
  method: 'POST',
  headers: headers,
  body: JSON.stringify(data)
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));
```

```
curl -X POST "https://gateway.pixazo.ai/gpt-image-2-text-to-image/v1/gpt-image-2-text-to-image/generate" \
  -H "Content-Type: application/json" \
  -H "Cache-Control: no-cache" \
  -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  --data-raw '{
    "prompt": "A photorealistic portrait of an astronaut on Mars at golden hour"
  }'
```

## Output

```
{
  "request_id": "gpt-image-2-text-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/gpt-image-2-text-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

[Try Now](https://api.pixazo.ai/api-details#api=gpt-image-2-text-to-image&operation=text-to-image-request)

## Webhook (Optional)

Add the `X-Webhook-URL` header to your generate request to receive a POST callback instead of polling.

```
X-Webhook-URL: https://your-server.com/webhook/callback
```

## Request Parameters - Text to Image

Parameter

Required

Type

Default

Allowed values / range

Description

prompt

Yes

string

—

non-empty

Text description of the desired image

quality

No

string

"auto"

"low", "medium", "high", "auto"

Image quality — higher = slower, more detail

background

No

string

"auto"

"auto", "transparent", "opaque"

Background handling. "transparent" requires output\_format of png or webp

moderation

No

string

"auto"

"auto", "low"

Content moderation level

aspect\_ratio

No

string

"1:1"

"1:1", "3:2", "2:3"

Output aspect ratio (square, landscape, portrait)

output\_format

No

string

"webp"

"png", "jpeg", "webp"

Output file format

number\_of\_images

No

integer

1

1–10

Number of images to generate in one request

output\_compression

No

integer

90

0–100

Compression level for jpeg / webp (no effect on png)

## Example Request (Full)

```
{
  "prompt": "A photorealistic portrait of an astronaut on Mars at golden hour",
  "quality": "high",
  "background": "auto",
  "moderation": "auto",
  "aspect_ratio": "3:2",
  "output_format": "png",
  "number_of_images": 2,
  "output_compression": 95
}
```

## Response

```
{
  "request_id": "gpt-image-2-text-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/gpt-image-2-text-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

## Request Headers

Header

Value

Content-Type

application/json

Cache-Control

no-cache

Ocp-Apim-Subscription-Key

YOUR\_API\_KEY

## Response Handling

Common status codes.

Code

Meaning

202

Accepted — Request queued

400

Bad Request

401

Unauthorized

402

Insufficient Balance

403

Forbidden

429

Too Many Requests

500

Internal Server Error

## Error Responses

Queue system errors and model validation errors.

### Queue System Errors

```
// 402 — Insufficient balance
{
  "error": "Insufficient Balance",
  "message": "Your wallet does not have enough balance."
}
```

```
// 400 — Model not found
{
  "error": "Model not found",
  "message": "Model 'gpt-image-2-text-to-image' not found or is disabled"
}
```

### Error via Status/Webhook

```
{
  "request_id": "gpt-image-2-text-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "gpt-image-2-text-to-image",
  "error": "Description of the error",
  "output": null
}
```

## Retrieving Results

Poll the universal status endpoint to check progress and retrieve results.

### Endpoint

```
GET https://gateway.pixazo.ai/v2/requests/status/{request_id}
Ocp-Apim-Subscription-Key: YOUR_API_KEY
```

## cURL Example

```
curl -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  "https://gateway.pixazo.ai/v2/requests/status/gpt-image-2-text-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
```

## Response (Completed)

```
{
  "request_id": "gpt-image-2-text-to-image_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "gpt-image-2-text-to-image",
  "error": null,
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/gpt-image-2-text-to-image_019dxxxx-xxxx/output.webp"
    ],
    "media_type": "image/webp"
  },
  "created_at": "2026-04-22T10:00:00.000Z",
  "updated_at": "2026-04-22T10:01:30.000Z",
  "completed_at": "2026-04-22T10:01:30.000Z"
}
```

## Response Fields

Field

Type

Description

request\_id

string

Unique request identifier

status

string

QUEUED, PROCESSING, COMPLETED, FAILED, or ERROR

model\_id

string

Model that processed the request

error

string|null

Error message if failed

output.media\_url

array

URLs to generated media (R2 CDN)

output.media\_type

string

MIME type of the output

created\_at

string

When request was created

completed\_at

string|null

When request completed

polling\_url

string

Status URL (initial response only)

## Status Values

Status

Description

QUEUED

Request accepted, waiting to be processed

PROCESSING

Being processed by the model

COMPLETED

Done — output contains the result

FAILED

Failed — check error field

ERROR

System error — not charged

## Status Flow

```
QUEUED → PROCESSING → COMPLETED
                    → FAILED
                    → ERROR
```

## Typical Workflow

1.  **Send a generate request** to the API endpoint
2.  **Save the `request_id`** from the response
3.  **Poll** every 5-10 seconds: `GET /v2/requests/status/{request_id}`
4.  **When `status` is `"COMPLETED"`**, download from `output.media_url`

**Tip:** Use `X-Webhook-URL` header to get a callback instead of polling.