Nucleus Image API - AI Image Generation APIs

Nucleus Image API provides developers with a streamlined interface to integrate advanced text-to-image generation capabilities into their applications. Built on a powerful open-source model, it allows users to convert descriptive text prompts into high-quality, diverse visual content with precision and efficiency. By offering flexible endpoints and compatibility with standard image generation protocols, the API simplifies the deployment of creative AI tools, making it accessible for everything from rapid prototyping to large-scale production environments.

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Nucleus Image Text to Image API Documentation

https://gateway.pixazo.ai/nucleus-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

Nucleus Image Request - Nucleus Image

Request Code

POST https://gateway.pixazo.ai/nucleus-image/v1/nucleus-image-request
Content-Type: application/json
Cache-Control: no-cache
Ocp-Apim-Subscription-Key: YOUR_API_KEY

{
  "prompt": "A weathered lighthouse on a rocky coastline at golden hour, waves crashing below, dramatic amber clouds, cinematic realism"
}

import requests

url = "https://gateway.pixazo.ai/nucleus-image/v1/nucleus-image-request"
headers = {
    "Content-Type": "application/json",
    "Cache-Control": "no-cache",
    "Ocp-Apim-Subscription-Key": "YOUR_API_KEY"
}
data = {
    "prompt": "A weathered lighthouse on a rocky coastline at golden hour, waves crashing below, dramatic amber clouds, cinematic realism"
}

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

const url = 'https://gateway.pixazo.ai/nucleus-image/v1/nucleus-image-request';
const headers = {
  'Content-Type': 'application/json',
  'Cache-Control': 'no-cache',
  'Ocp-Apim-Subscription-Key': 'YOUR_API_KEY'
};
const data = {
  prompt: 'A weathered lighthouse on a rocky coastline at golden hour, waves crashing below, dramatic amber clouds, cinematic realism'
};

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/nucleus-image/v1/nucleus-image-request" \
  -H "Content-Type: application/json" \
  -H "Cache-Control: no-cache" \
  -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  --data-raw '{
    "prompt": "A weathered lighthouse on a rocky coastline at golden hour, waves crashing below, dramatic amber clouds, cinematic realism"
  }'

Output

{
  "request_id": "nucleus-image_019exxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/nucleus-image_019exxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}

Try Now

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 - Nucleus Image Request

Parameter	Required	Type	Description
prompt	Yes	string	Text description of the image to generate
negative_prompt	No	string	Words/concepts to avoid in the generated image
aspect_ratio	No	string	Aspect ratio of the output (e.g. "1:1", "16:9", "9:16", "4:3", "3:4")
num_inference_steps	No	integer	Number of denoising steps (default 50). Higher values can improve detail but take longer
guidance_scale	No	number	Classifier-free guidance scale (default 8). Higher values follow the prompt more strictly
num_images	No	integer	Number of images to generate per request (default 1)
enable_safety_checker	No	boolean	Enable the NSFW / safety filter (default true)
output_format	No	string	Output format: "png" (default), "jpg"

Example Request

{
  "prompt": "A weathered lighthouse on a rocky coastline at golden hour, waves crashing below, dramatic amber clouds, cinematic realism",
  "negative_prompt": "blurry, low quality, distorted text",
  "aspect_ratio": "1:1",
  "num_inference_steps": 50,
  "guidance_scale": 8,
  "num_images": 1,
  "enable_safety_checker": true,
  "output_format": "png"
}

Response

{
  "request_id": "nucleus-image_019exxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/nucleus-image_019exxxx-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 'nucleus-image' not found or is disabled"
}

Error via Status/Webhook

{
  "request_id": "nucleus-image_019exxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "nucleus-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/nucleus-image_019exxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

Response (Completed)

{
  "request_id": "nucleus-image_019exxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "nucleus-image",
  "error": null,
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/nucleus-image_019exxxx-xxxx/output.png"
    ],
    "media_type": "image/png"
  },
  "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

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

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

Nucleus Image Text to Image API Pricing

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