Seedream 5.0 Pro Layer Decomposition
Split an image into a base and transparent layers through the PixMind API.
Decompose one image into a base image and transparent PNG layers, retaining positions and stacking order.
Provider
ByteDanceModel ID
seedream-5.0-pro-layeredEndpoint
POST /api-platform/v1/generationsAuthentication
Base URL: https://aihub-admin.aimix.pro. Send Authorization: Bearer <PIXMIND_API_KEY> on both creation and polling requests, and Content-Type: application/json when submitting JSON. Keep your key in a server environment variable.
Model notes
- Exactly one PNG/JPEG input is required. Prompt is optional. Supply size 1K, 1.5K, 2K or auto; aspect ratios and exact pixels are not accepted for decomposition.
- Preauthorization covers up to 17 outputs including the base image. Final charge is APIMart's final USD task cost × 1.15 × 6.77 × 140, rounded up once to whole credits. Excess preauthorization is refunded; failed tasks are refunded. API use does not require a website subscription.
- Poll GET /api-platform/v1/tasks/{taskId}. Completed tasks contain images, layers (url, zIndex, size, outputFormat, boundingBox) and billing.settledPoints. Compose layers in ascending zIndex order.
- Alternatively send model seedream-5.0-pro with layer_decomposition=true. All other generation requests retain the standard image pricing.
Request parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
model | string | Yes | Layer decomposition model ID. Default: |
image_urls | string[] | Yes | Exactly one public image URL or PNG/JPEG data URL; input up to 30 MB and 262144–36000000 total pixels. |
prompt | string | No | Optional decomposition instructions. |
size | string | No | Output resolution tier. Allowed values: Default: |
numLayers | integer | No | Optional output-count prompt hint from 2 through 17, including the base. Actual output count can differ. |
Request example
curl --request POST 'https://aihub-admin.aimix.pro/api-platform/v1/generations' \
-H "Authorization: Bearer $PIXMIND_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedream-5.0-pro-layered",
"image_urls": [
"https://example.com/poster.png"
],
"size": "2K"
}'// Node.js 20+. Keep the API key on your server.
const apiKey = process.env.PIXMIND_API_KEY;
if (!apiKey) throw new Error("PIXMIND_API_KEY is required");
const response = await fetch("https://aihub-admin.aimix.pro/api-platform/v1/generations", {
method: "POST",
headers: {
Authorization: `Bearer ${apiKey}`,
"Content-Type": "application/json"
},
body: JSON.stringify({
"model": "seedream-5.0-pro-layered",
"image_urls": [
"https://example.com/poster.png"
],
"size": "2K"
}),
signal: AbortSignal.timeout(30_000)
});
const task = await response.json();
if (!response.ok || task.code !== 1000) {
throw new Error(task.message ?? task.error?.message ?? `HTTP ${response.status}`);
}
console.log(task);Accepted task response
Generation is asynchronous. Save taskId and poll GET /api-platform/v1/tasks/{taskId} until status is ready or failed.
{
"code": 1000,
"data": {
"id": "img_44160",
"taskId": 44160,
"type": "image",
"model": "seedream-5.0-pro-layered",
"status": "processing"
}
}Query the task and retrieve results
Replace 44160 with data.taskId from the accepted response, using a key belonging to the same user. pending and processing are non-terminal; ready and failed are terminal. On ready, read images (images) or videoUrl (videos); on failed, read errorMessage. The example stops after 60 queries. If it times out, save taskId and query again later instead of creating a duplicate task. Example result URLs are placeholders.
curl 'https://aihub-admin.aimix.pro/api-platform/v1/tasks/44160' \
-H "Authorization: Bearer $PIXMIND_API_KEY"// Continue after the request example above.
const taskId = task.data?.taskId;
if (!Number.isInteger(taskId)) throw new Error("Missing numeric taskId");
async function waitForTask(taskId) {
for (let attempt = 0; attempt < 60; attempt++) {
await new Promise(resolve => setTimeout(resolve, Math.min(2000 * 1.5 ** attempt, 10000)));
const response = await fetch(`https://aihub-admin.aimix.pro/api-platform/v1/tasks/${taskId}`, {
headers: { Authorization: `Bearer ${apiKey}` },
signal: AbortSignal.timeout(30_000)
});
const result = await response.json();
if (!response.ok || result.code !== 1000) {
throw new Error(result.message ?? `HTTP ${response.status}`);
}
const data = result.data;
if (data.status === "ready") return data;
if (data.status === "failed") {
throw new Error(data.errorMessage ?? "Generation failed");
}
if (!["pending", "processing"].includes(data.status)) {
throw new Error(`Unexpected task status: ${data.status}`);
}
}
throw new Error(`Polling timed out; save taskId ${taskId} to query again later`);
}
const result = await waitForTask(taskId);
console.log(result.images);{
"code": 1000,
"data": {
"taskId": 44160,
"type": "image",
"model": "seedream-5.0-pro-layered",
"status": "ready",
"progress": 100,
"images": [
"https://example.com/result.png"
]
}
}