Z-Image - PoYo AI

curl --request POST \
  --url https://api.poyo.ai/api/generate/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "z-image",
  "callback_url": "https://your-domain.com/callback",
  "input": {
    "prompt": "A serene mountain landscape at sunset with vibrant colors",
    "size": "1:1",
    "enable_safety_checker": true
  }
}
'

{
  "code": 200,
  "data": {
    "task_id": "task-unified-1757165031-uyujaw3d",
    "status": "not_started",
    "created_time": "2025-11-12T10:30:00"
  }
}

{
  "code": 400,
  "error": {
    "message": "Invalid request parameters",
    "type": "invalid_request_error"
  }
}

{
  "code": 400,
  "error": {
    "message": "Invalid request parameters",
    "type": "invalid_request_error"
  }
}

POST

api

generate

submit

curl --request POST \
  --url https://api.poyo.ai/api/generate/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "z-image",
  "callback_url": "https://your-domain.com/callback",
  "input": {
    "prompt": "A serene mountain landscape at sunset with vibrant colors",
    "size": "1:1",
    "enable_safety_checker": true
  }
}
'

{
  "code": 200,
  "data": {
    "task_id": "task-unified-1757165031-uyujaw3d",
    "status": "not_started",
    "created_time": "2025-11-12T10:30:00"
  }
}

{
  "code": 400,
  "error": {
    "message": "Invalid request parameters",
    "type": "invalid_request_error"
  }
}

{
  "code": 400,
  "error": {
    "message": "Invalid request parameters",
    "type": "invalid_request_error"
  }
}

After submission, a task_id will be returned. If you provided a callback_url, when the task status becomes finished or failed, a POST request will be sent to the callback_url.
Regardless of whether callback_url is provided, you can retrieve the result through the unified Query Task Status endpoint.

Generate high-quality images using the Z-Image model. Supports both text-to-image and image editing with a unified request shape. z-image uses a unified request format:

If input.image_urls is omitted, the request is handled as text-to-image
If input.image_urls is provided, the request is handled as image editing automatically

Models

z-image - Unified text-to-image and image editing model

Required parameters

prompt - Required prompt, max 1000 characters

Optional parameters

size - Required for text-to-image, optional for image editing. Supported values: 1:1, 4:3, 3:4, 16:9, 9:16
image_urls - Optional reference image array for editing, must contain exactly 1 image URL
enable_safety_checker - Optional boolean safety checker switch, defaults to true

Examples

Use the unified submit endpoint: POST /api/generate/submit Text-to-image example:

curl --request POST \
  --url https://api.poyo.ai/api/generate/submit \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "z-image",
    "callback_url": "https://your-domain.com/callback",
    "input": {
      "prompt": "A serene mountain landscape at sunset with vibrant colors",
      "size": "1:1",
      "enable_safety_checker": true
    }
  }'

Image editing example:

curl --request POST \
  --url https://api.poyo.ai/api/generate/submit \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "z-image",
    "callback_url": "https://your-domain.com/callback",
    "input": {
      "prompt": "Turn this product photo into a premium studio shot with soft rim lighting",
      "image_urls": ["https://example.com/reference-image.png"],
      "size": "4:3",
      "enable_safety_checker": true
    }
  }'

Notes

input.image_urls[0] is used as the edit reference image
When image_urls is present, size can be omitted

Authorizations

Authorization

string

header

required

All API endpoints require Bearer Token authentication.

Create an API key: sign in to PoYo, open Dashboard → API Key at poyo.ai/dashboard/api-key, and click to create a key.

Add it to the request header:

Authorization: Bearer YOUR_API_KEY

Body

application/json

model

enum<string>

required

Z-Image model identifier

Available options:

z-image

input

object

required

Input parameters for generation. size is required for text-to-image. When image_urls is present, the request is routed to image editing automatically and size becomes optional.

Show child attributes

callback_url

string<uri>

Webhook callback URL for result notifications

Example:

"https://your-domain.com/callback"

Response

Task submitted successfully

code

enum<integer>

required

Business status code. 200 means success; any other value means the request failed. Always check this field: some validation errors return HTTP 200 with code: 400 in the body.

200: Success
400: Invalid request parameters
401: Missing or invalid API key
402: Insufficient credits
403: Permission denied
404: Resource not found
408: Request timeout
429: Rate limit exceeded
500: Internal server error
502: Upstream service error
503: Service unavailable

See Error Codes for details.

Available options:

200,

400,

401,

402,

403,

404,

408,

429,

500,

502,

503

Example:

200

data

object

required

Show child attributes

​Models

​Required parameters

​Optional parameters

​Examples

​Notes

Authorizations

Body

Response

Models

Required parameters

Optional parameters

Examples

Notes