seedream-image

# Seedream Image Use `POST https://api.acedata.cloud/seedream/images`. Authenticate with `Authorization: Bearer $ACEDATACLOUD_API_TOKEN` and JSON request bodies. ## Pick the model from the requested capability | Capability | Seedream 5.0 Pro | Seedream 5.0 Lite | |---|---|---| | Model ID | `doubao-seedream-5-0-pro-260628` | `doubao-seedream-5-0-260128` (alias: `doubao-seedream-5-0-lite-260128`) | | Generate/edit one image | Yes | Yes | | Reference images | Up to 10 | Up to 14 | | Related image set | No | Yes; input + output ≤ 15 | | Streaming / web search | No | Yes | | Layer decomposition / transparent background | Yes | No | | Prompt optimization | `standard`, `fast` | `standard` | | Preset sizes | `1K`, `1.5K`, `2K` | `2K`, `3K`, `4K` | Seedream 4.5 and 4.0 remain available for compatibility. Do not send a parameter to a model that does not support it. ## Generate or edit ```bash curl https://api.acedata.cloud/seedream/images \ -H "Authorization: Bearer $ACEDATACLOUD_API_TOKEN" \ -H "Content-Type: application/json" \ -d '{ "model": "doubao-seedream-5-0-260128", "prompt": "a four-panel storyboard of a courier crossing a rainy neon city", "size": "2K", "sequential_image_generation": "auto", "sequential_image_generation_options": {"max_images": 4}, "watermark": false }' ``` For editing, add `image` as one URL/Base64 string or an array. `response_format` is `url` or `b64_json`; 5.0 Pro/Lite also support `output_format` as `jpeg` or `png`. Explicit dimensions use `WIDTHxHEIGHT` and must satisfy the selected model's pixel and aspect-ratio limits. Use Lite web search only when current information matters: ```json {"tools": [{"type": "web_search"}]} ``` ## Transparent-background Pro edit Use one transparent PNG input and PNG output: ```json { "model": "doubao-seedream-5-0-pro-260628", "prompt": "replace the parrot with a peacock", "image": "https://example.com/layer.png", "background": "transparent", "output_format": "png", "size": "1.5K" } ``` Do not combine `background` with layer decomposition. `transparent` with JPEG is invalid. ## Decompose an image into editable layers `layer_decomposition` is Pro-only and requires exactly one PNG/JPEG. Omit `prompt` for automatic decomposition, describe desired elements in natural language, or use normalized `<bbox>` coordinates. ```bash curl https://api.acedata.cloud/seedream/images \ -H "Authorization: Bearer $ACEDATACLOUD_API_TOKEN" \ -H "Content-Type: application/json" \ -d '{ "model": "doubao-seedream-5-0-pro-260628", "image": "https://example.com/poster.png", "layer_decomposition": true, "size": "auto", "watermark": false }' ``` The response contains one base image (`z_index: 0`) and up to 16 transparent PNG layers. Each layer can include `name`, `description`, and `bounding_box.absolute`/`normalized`. To recompose, scale each layer to its bounding-box width and height, place it at left/top, and draw in ascending `z_index`. Any layer failure fails the whole decomposition. ## Async tasks Generation can take time. Prefer `"async": true`; the response returns `task_id`. Poll using: ```json POST /seedream/tasks {"action": "retrieve", "id": "<task_id>"} ``` Follow [async task polling](../_shared/async-tasks.md). Use `callback_url` only when a real public webhook exists. Do not use a health endpoint as a fake callback. ## Streaming Lite/4.x support streaming. Send `"stream": true` with `Accept: application/x-ndjson`; read one normalized JSON event per line until `image_generation.completed`. Do not combine streaming with `async` or `callback_url`. - `image_generation.partial_succeeded`: one generated image - `image_generation.partial_failed`: one failed item; other Lite images may still succeed - `image_generation.completed`: final usage and the only billing completion ## Agent tools - MCP: `pip install mcp-seedream-pro`; use `seedream_generate_image`, `seedream_edit_image`, `seedream_decompose_image`, then poll with `seedream_get_task`. - CLI: `pip install seedream-cli`; use `seedream generate`, `seedream edit`, `seedream decompose`, or `seedream generate --stream --json`. - Hosted MCP: `https://seedream.mcp.acedata.cloud/mcp`. MCP image tools are asynchronous, so use REST or CLI for real-time streaming. ## Result and billing safeguards - URL results expire; persist files promptly. - Lite `data[]` may mix successful images and per-item `error` objects. Count only successful images. - Pro layer items are billed individually by actual output size; the base and every successful layer count separately. - Preserve `z_index`, bounding boxes, item errors, `tools`, and `usage`; do not flatten the response to a URL list. - Never estimate final billed cost from requested size alone. Use the returned `cost`/usage and the live pricing page: https://platform.acedata.cloud/services/seedream?tab=pricing.