Z Image API

Complete API reference for Z Image text-to-image generation.

Model Variants

This API supports one model variant:

Quick Comparison

Supported Aspect Ratios

The width:height pair must be one of:

1:1, 3:2, 2:3, 3:4, 4:3, 9:16, 16:9, 9:21

Z Image (Text-to-Image)

Endpoint

POST /api/v1/image/task

Request Parameters

Required

Optional

Example Request

javascriptCopy
const response = await fetch('https://api.flaq.ai/api/v1/image/task', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model_name: 'z-image',
    prompt: 'A cinematic portrait of a traveler standing on a cliff at golden hour',
    width: 16,
    height: 9,
    seed: 0
  })
});

const { data } = await response.json();
const taskId = data.task_id;

Response Format

Submit response:

jsonCopy
{
  "code": 0,
  "message": "success",
  "data": {
    "task_id": "{task_id}",
    "response_url": "https://api.flaq.ai/api/v1/image/{task_id}",
    "task_status": "submitted"
  }
}

Poll with GET /api/v1/image/{task_id}. Task statuses: submitted, processing, succeed, failed.

Successful polling responses expose generated image URLs under data.task_result.images[].url.

Best Practices

• Use ratio values, not pixel dimensions, for width and height.
• Keep prompts descriptive but focused on subject, lighting, and composition.
• Use a fixed seed when you want reproducible generations during testing.