Qwen Image - APIXO

Overview

Qwen Image is an asynchronous image-to-image API. Provide one source image and a prompt, then poll the task until the generated variants are ready.

Capability	Value
Model ID	`qwen`
Mode	`image-to-image`
Prompt length	1-2000 characters
Source image	Exactly 1 public `image_url`
Images per task	`num_images` must be `1`, `2`, `3`, or `4`
Aspect ratios	`1:1`, `4:3`, `3:4`, `9:16`, `16:9`
Speed options	`none`, `regular`, `high`
Output formats	`png`, `jpeg`

Endpoint and authentication

Base URL:

https://api.apixo.ai/api/v1

Method	Endpoint	Purpose
`POST`	`/generateTask/qwen`	Submit an image-to-image task
`GET`	`/statusTask/qwen?taskId={taskId}`	Poll task status and retrieve results

All requests require your APIXO API key:

Authorization: Bearer YOUR_API_KEY

Submit requests also require:

Content-Type: application/json

Copy-paste async quickstart

curl -X POST "https://api.apixo.ai/api/v1/generateTask/qwen" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "input": {
      "mode": "image-to-image",
      "prompt": "turn this product photo into a clean studio hero image with soft reflections",
      "image_url": "https://example.com/source.png",
      "num_images": 2,
      "aspect_ratio": "16:9",
      "speed": "regular",
      "output_format": "png"
    }
  }'

Successful response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678"
  }
}

Save the taskId; you need it to poll for the final result.

Poll for result

curl -X GET "https://api.apixo.ai/api/v1/statusTask/qwen?taskId=task_12345678" \
  -H "Authorization: Bearer YOUR_API_KEY"

Success response:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "success",
    "resultJson": "{\"resultUrls\":[\"https://file.apixo.ai/image-1.png\",\"https://file.apixo.ai/image-2.png\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965652317,
    "costTime": 41388
  }
}

Parse resultJson after state becomes success:

const payload = JSON.parse(data.resultJson);
const imageUrls = payload.resultUrls;

Request body

{
  "request_type": "async",
  "callback_url": "https://your-server.com/webhooks/apixo",
  "input": {
    "mode": "image-to-image",
    "prompt": "transform into a warm sunrise scene with cinematic lighting",
    "image_url": "https://example.com/source.jpg",
    "num_images": 4,
    "aspect_ratio": "16:9",
    "speed": "regular",
    "num_inference_steps": 30,
    "guidance_scale": 8,
    "output_format": "jpeg",
    "negative_prompt": "low quality, blurry, distorted",
    "seed": 42
  }
}

Parameters

request_type

string

default:"async"

required

Result delivery mode. Use async for polling with statusTask, or callback for webhook delivery.

callback_url

string

Required when request_type is callback. Must be a callback URL that can receive the final task payload. See Webhooks.

input

object

required

Qwen Image input parameters.

Show properties

mode

string

default:"image-to-image"

Generation mode. The only supported value is image-to-image. If omitted, the backend resolves this single supported mode automatically.

prompt

string

required

Prompt text. Must be a non-empty string and cannot exceed 2000 characters.

image_url

string

required

Source image URL. Must be a directly fetchable public image URL.

num_images

integer

required

Number of requested output images. Supported values: 1, 2, 3, 4.

aspect_ratio

string

Optional output aspect ratio. Supported values: 1:1, 4:3, 3:4, 9:16, 16:9.

speed

string

default:"none"

Optional generation speed. Supported values: none, regular, high.

num_inference_steps

integer

default:"25"

Optional inference step count. Supported range: 2-49.

guidance_scale

integer

default:"4"

Optional guidance scale. Supported range: 0-20.

output_format

string

default:"png"

Output image format. Supported values: png, jpeg.

negative_prompt

string

Optional negative prompt. Maximum length is 500 characters.

seed

integer

Optional random seed.

sync_mode

boolean

Optional sync flag for compatibility. For normal APIXO task usage, keep the default asynchronous workflow.

Response format

Submit task response

POST /generateTask/qwen returns a task ID when the task is accepted:

code

integer

API status code. 200 means the task was accepted.

message

string

Human-readable status message.

data.taskId

string

Unique task identifier used with the status endpoint.

Status response fields

taskId

string

Unique task identifier.

state

string

Current task state: pending, processing, success, or failed.

resultJson

string

JSON string containing generated image URLs in resultUrls. Present when state is success.

failCode

string

Machine-readable failure code. Present when state is failed.

failMsg

string

Human-readable failure message. Present when state is failed.

createTime

integer

Task creation timestamp in Unix milliseconds.

completeTime

integer

Task completion timestamp in Unix milliseconds. Present after completion.

costTime

integer

Processing duration in milliseconds when available.

Webhook callback mode

Use callback mode when your backend should receive the final result automatically instead of polling.

curl -X POST "https://api.apixo.ai/api/v1/generateTask/qwen" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "callback",
    "callback_url": "https://your-server.com/webhooks/apixo",
    "input": {
      "mode": "image-to-image",
      "prompt": "make this image look like a premium editorial campaign",
      "image_url": "https://example.com/source.jpg",
      "num_images": 1
    }
  }'

See Webhooks for delivery requirements and retry behavior.

Billing

Qwen Image is billed by the requested num_images value.

Requested images	APIXO price
`1`	`$0.025 / generation`
`2`	`$0.050 / generation`
`3`	`$0.075 / generation`
`4`	`$0.100 / generation`

For current route and market comparison pricing, see Pricing.

Latency and polling

Qwen Image tasks are asynchronous. Actual latency varies by source image fetch speed, requested image count, prompt complexity, and queue load.

Use case	Recommended first poll	Poll interval
Normal image-to-image task	10s-15s after task creation	5s-10s
Multiple outputs or high-concurrency workloads	Prefer callback mode	If polling, use 10s or longer

For production queues or batches, use callback mode to avoid frequent polling.

Rate limits and concurrency can vary by account, API key, and route. If you receive 429, slow down requests and retry with backoff. For account-level details, see System APIs.

Errors and troubleshooting

HTTP errors

Code	Meaning	What to do
`400`	Invalid request body, parameter type, or value	Fix the request before retrying
`401`	Missing or invalid API key	Check the `Authorization` header
`402`	Insufficient balance or quota	Add balance or switch account/key
`403`	Key or route cannot access the model	Check permissions and route strategy
`404`	Task not found	Verify the `taskId` and model ID
`429`	Rate limit or concurrency limit reached	Retry with exponential backoff
`500`	Server or unmapped model error	Retry with backoff
`502`	Model service error	Retry with backoff
`504`	Model service timeout	Retry or use callback mode for long-running jobs

Request validation

Condition	Backend behavior
Missing `input`	Returns `The required parameter {{input}} is missing.`
Missing `prompt`	Returns `The required parameter {{prompt}} is missing.`
Prompt is empty or too long	Returns a validation or length error
Missing `image_url`	Returns `The required parameter {{image_url}} is missing.`
Invalid `num_images`	Returns `The parameter {{num_images}} must be 1, 2, 3 or 4.`
Invalid `aspect_ratio`	Returns the supported aspect-ratio list
Invalid `speed`	Returns `The parameter {{speed}} must be either 'none', 'regular' or 'high'.`
Invalid `output_format`	Returns `The parameter {{output_format}} must be either 'jpeg' or 'png'.`

See Error Codes for the full error reference.

​Overview

​Endpoint and authentication

​Copy-paste async quickstart

​Poll for result

​Request body

​Parameters

​Response format

​Submit task response

​Status response fields

​Webhook callback mode

​Billing

​Latency and polling

​Errors and troubleshooting

​HTTP errors

​Request validation

​Related links

Overview

Endpoint and authentication

Copy-paste async quickstart

Poll for result

Request body

Parameters

Response format

Submit task response

Status response fields

Webhook callback mode

Billing

Latency and polling

Errors and troubleshooting

HTTP errors

Request validation

Related links