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by Alibaba

Up to six detailed 2K images from one prompt

alibaba/qwen-image-2.1-pro/editFrom 6 creditsper image · $0.06
  • Up to 2K
  • Up to 10 reference images
  • 15 aspect ratios
  • Up to 6 per run
  • Create Image
  • Edit Image

Call it with the model name alibaba/qwen-image-2.1-pro/edit on POST /jobs/createTask, from 6 credits per image ($0.06). New accounts get 30 free credits to try it in the Playground first.

Model namealibaba/qwen-image-2.1-pro/edit
EndpointPOST https://api.popnow.ai/api/v1/jobs/createTask
# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -d '{
  "model": "alibaba/qwen-image-2.1-pro/edit",
  "input": {
    "prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
    "image_urls": [
      "https://media.popnow.ai/influencer/examples/marco.webp"
    ],
    "resolution": "2k",
    "num_outputs": 1
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

The input is built from the schema below, so it passes validation as written. Change the prompt and links to your own.

Price

OptionCredits per image≈ USD
Standard5.4$0.054

1 credit = $0.01 · Every option and its price: GET /models/alibaba/qwen-image-2.1-pro/edit

Each task is rounded up to whole credits, so one run at the lowest tier costs 6 credits per image ($0.06).

Limits

Resolutions
1K · 1.5K · 2K
Aspect ratios
1:1 · 16:9 · 9:16 · 4:3 · 3:4 · 3:2 +9
Outputs per call
1–6
Reference images
10
Prompt length (characters)
5,000
Largest upload
10 MB

Parameters

These fields come from the same schema we check every request against. Fields that are not listed are rejected.

  • promptstringRequired

    Describe the subject, composition, lighting, and any wording to render. There is no negative prompt: write what to leave out directly in the prompt.

    Range
    1 – 5000 chars
  • image_urlsarray<string>Required

    Photos to edit or combine. Say in the prompt what each one adds.

    Range
    1 – 10 items · image/jpeg, image/png, image/webp, image/gif · ≤ 10 MB
  • aspect_ratiostringOptional

    The shape of the frame: wide, square or tall.

    Allowed values
    "1:1""16:9""9:16""4:3""3:4""3:2""2:3""21:9""9:21""2:1""1:2""3:1""1:3""5:4""4:5"
  • resolutionstringOptional

    Output size. Bigger sizes look sharper and cost more.

    Default
    "2k"
    Allowed values
    "1k""1.5k""2k"
  • num_outputsintegerOptionalChanges the price

    How many results to make in one go.

    Default
    1
    Range
    1 – 6
  • enable_prompt_expansionbooleanOptional

    Lets the model add detail to a short prompt.

    Default
    false
  • enable_thinkingbooleanOptional

    Spend extra reasoning on the rewrite for better images, at the cost of a longer wait. Only works while prompt expansion is on.

    Default
    true
  • seedintegerOptional

    Reuse the same number to get a repeatable result.

    Range
    0 – 2147483647
Raw JSON Schema
{
  "additionalProperties": false,
  "properties": {
    "aspect_ratio": {
      "description": "Output aspect ratio. Omit it to let the model choose a size from the source images.",
      "enum": [
        "1:1",
        "16:9",
        "9:16",
        "4:3",
        "3:4",
        "3:2",
        "2:3",
        "21:9",
        "9:21",
        "2:1",
        "1:2",
        "3:1",
        "1:3",
        "5:4",
        "4:5"
      ],
      "type": "string"
    },
    "enable_prompt_expansion": {
      "default": false,
      "description": "Let the service rewrite and expand the prompt before generating.",
      "type": "boolean"
    },
    "enable_thinking": {
      "default": true,
      "description": "Spend extra reasoning on the rewrite for better images, at the cost of a longer wait. Only works while prompt expansion is on.",
      "type": "boolean"
    },
    "image_urls": {
      "description": "One to ten source images, in the order you refer to them in the prompt (Image 1, Image 2 and so on).",
      "items": {
        "contentMediaType": [
          "image/jpeg",
          "image/png",
          "image/webp",
          "image/gif"
        ],
        "format": "uri",
        "minLength": 1,
        "type": "string"
      },
      "maxItems": 10,
      "minItems": 1,
      "type": "array"
    },
    "num_outputs": {
      "default": 1,
      "description": "How many images to generate in one request (1 to 6). Billed per image returned.",
      "maximum": 6,
      "minimum": 1,
      "type": "integer"
    },
    "prompt": {
      "description": "Describe the subject, composition, lighting, and any wording to render. There is no negative prompt: write what to leave out directly in the prompt.",
      "maxLength": 5000,
      "minLength": 1,
      "type": "string"
    },
    "resolution": {
      "default": "2k",
      "description": "Output resolution tier. Every tier costs the same.",
      "enum": [
        "1k",
        "1.5k",
        "2k"
      ],
      "type": "string"
    },
    "seed": {
      "description": "Random seed for controlled comparisons.",
      "maximum": 2147483647,
      "minimum": 0,
      "type": "integer"
    }
  },
  "required": [
    "prompt",
    "image_urls"
  ],
  "type": "object"
}

Responses, polling and callbacks

Every model works the same way: create a task, then poll it or wait for a callback.

Price it first

cURL
curl -X POST https://api.popnow.ai/api/v1/jobs/quote \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "alibaba/qwen-image-2.1-pro/edit",
  "input": {
    "prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
    "image_urls": [
      "https://media.popnow.ai/influencer/examples/marco.webp"
    ],
    "resolution": "2k",
    "num_outputs": 1
  }
}'

Same body as createTask. It returns the expected and the highest possible charge, and runs nothing.

Accepted

HTTP
HTTP/1.1 202 Accepted

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "task_01k3m8x9q2z4v7n5p6r8s0t1w3",
    "state": "queued"
  },
  "request_id": "req_example_create"
}

HTTP 202 means the task was accepted and the credits are held, not charged yet. The final charge never goes above the hold.

Check status

cURL
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Poll every few seconds with backoff and stop once state is succeeded, failed, canceled or expired.

Finished task

JSON
{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "task_01k3m8x9q2z4v7n5p6r8s0t1w3",
    "model": "alibaba/qwen-image-2.1-pro/edit",
    "state": "succeeded",
    "output": {
      "assets": [
        {
          "url": "https://cdn.popnow.ai/tasks/task_01k3m8x9q2z4v7n5p6r8s0t1w3/output.png?signature=FROM_RESPONSE",
          "expiresAt": "2026-10-17T12:20:00Z",
          "mime": "image/png",
          "width": 1024,
          "height": 1024
        }
      ]
    },
    "settled": true
  },
  "request_id": "req_example_record"
}

Download from url before expiresAt. Need a fresh link later? Ask POST /common/download-url.

Verify a callback

Node.js
import { createHash, createHmac, timingSafeEqual } from "node:crypto";
import express from "express";

const app = express();
// express.raw keeps the exact bytes that were signed; express.json would not match.
app.post("/hooks/popnow", express.raw({ type: "application/json" }), (req, res) => {
  const timestamp = req.header("X-Webhook-Timestamp");
  const signature = req.header("X-Webhook-Signature") ?? "";
  const body = JSON.parse(req.body.toString("utf8"));
  const taskId = body.data?.taskId ?? body.task_id;
  const digest = createHash("sha256").update(req.body).digest("hex");
  const expected = createHmac("sha256", process.env.POPNOW_WEBHOOK_SECRET)
    .update(`${taskId}.${timestamp}.${digest}`)
    .digest("base64");
  const ok = expected.length === signature.length && timingSafeEqual(Buffer.from(expected), Buffer.from(signature));
  // Check the signature first, then reject anything older than five minutes.
  if (!ok || Math.abs(Date.now() / 1000 - Number(timestamp)) > 300) return res.status(401).end();
  res.status(200).end(); // answer fast, then fetch the task and store its files
});

With callBackUrl set, we post the finished task to you. Check the signature against the raw body before you trust it.

Send a local file

cURL
curl -X POST https://api.popnow.ai/api/v1/common/upload-url \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"contentType": "image/png", "bytes": 482113}'

# PUT the file bytes to data.uploadUrl with every header in data.headers, then commit it:
curl -X POST https://api.popnow.ai/api/v1/files/$FILE_ID/commit \
  -H "Authorization: Bearer $POPNOW_API_KEY"
# The commit returns a popnow://f/... reference. Put it in any image, video or
# audio field of the task input instead of a public https URL.

Public https links work as they are. Local files go through upload-url and commit first.