Seedream 4.0 API reference
Exact sizes up to 4096×2304 and ten-reference edits
Call Seedream 4.0 from your own code with one PopNow API key. Below are the exact model IDs to send, every input field the model accepts, what each request costs in credits, and a request you can paste into a terminal.
At a glance
- Made by
- ByteDance
- Output
- Image
- From
- 4.5 credits per image ($0.045)
- Typical time
- about 20 s
1 credit = $0.01. A task holds the highest possible charge when it is accepted and settles the real amount when it finishes, rounded up to whole credits; failed tasks are not charged. Ask POST /api/v1/jobs/quote for the exact figure before you run.
Create Image
bytedance/seedream-4.0/text-to-image
Price
| Option | Credits (per image) | US dollars |
|---|---|---|
Default | 4.5 | $0.045 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | — | Describe the image to generate: subject, composition, style, and lighting. |
sizeOptional | string | 2048*2048 | 2048*2048, 1024*1024, 2304*1728, 1728*2304, 2848*1600, 1600*2848, 2496*1664, 1664*2496, 3136*1344, 3072*3072, 3456*2592, 2592*3456, 4096*2304, 2304*4096, … (+2) | Output image size in pixels, written as width*height. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask?wait=60" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "bytedance/seedream-4.0/text-to-image",
"input": {
"prompt": "A cozy reading nook beside a rain-streaked window, warm lamp light, a sleeping orange cat on a knitted blanket, soft film grain"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"Edit Image
bytedance/seedream-4.0/edit
Price
| Option | Credits (per image) | US dollars |
|---|---|---|
Default | 4.5 | $0.045 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | — | Describe the image to produce from the source: subject, composition, style, and lighting. |
image_urlsRequired | array<string (uri)> | — | up to 10 items | Source images that you are authorised to process. |
sizeOptional | string | 2048*2048 | 2048*2048, 1024*1024, 2304*1728, 1728*2304, 2848*1600, 1600*2848, 2496*1664, 1664*2496, 3136*1344, 3072*3072, 3456*2592, 2592*3456, 4096*2304, 2304*4096, … (+2) | Output image size in pixels, written as width*height. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
The example uses PopNow sample files in image_urls. Replace them with your own public HTTPS links, uploads or saved assets.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask?wait=60" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "bytedance/seedream-4.0/edit",
"input": {
"prompt": "Change the orange jacket to deep forest green and add soft golden-hour light; keep the face, pose and background unchanged",
"image_urls": [
"https://media.popnow.ai/influencer/examples/marco.webp"
]
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"