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bytedance/seedance-2.5/text-to-video

ByteDance's Seedance 2.5 text-to-video builds the whole frame from a written prompt, with sound in the same pass. Clips run 4 to 30 seconds at 480p, 720p or 1080p, in six aspect ratios, and come back as MP4 or MOV.

From $0.123/s
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Quickstart

Examples use the selected endpoint’s public parameter definitions. Replace the API key and example media, then send the request from your server.

SDKs & integrations
POSThttps://api.spicyapi.ai/api/v1/jobs/createTask

API authentication

Keep the API key in the server environment variable SPICY_API_KEY. Use Bearer authentication and Content-Type: application/json for JSON requests.

Authorization: Bearer $SPICY_API_KEY
Sample outputUse this example
# Generate the idempotency key once; reuse it when retrying after a lost response.
export SPICY_IDEMPOTENCY_KEY="${SPICY_IDEMPOTENCY_KEY:-$(uuidgen)}"
curl -X POST https://api.spicyapi.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $SPICY_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $SPICY_IDEMPOTENCY_KEY" \
  -d '{
  "model": "bytedance/seedance-2.5/text-to-video",
  "input": {
    "prompt": "A slow aerial shot drifting over a misty pine forest at sunrise",
    "resolution": "720p",
    "aspect_ratio": "adaptive",
    "output_format": "mp4",
    "generate_audio": true,
    "duration_seconds": 5
  }
}'

# Copy data.taskId from the response into TASK_ID, then poll the status.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.spicyapi.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $SPICY_API_KEY"

Generated from this model’s input schema — the same one the API validates every request against.

Input parameters

Place these fields inside the request body’s input object. Names and types match the API. Do not assume a default when none is specified.

promptstringRequired

The only source of what appears on screen, and the only lever on tone. Order it as subject, action, camera, light, sound, one idea per sentence. Wording is accepted by us without review, but Seedance's own safety layer refuses some of it before rendering — kissing is the reliable trigger, while a whisper at the ear or foreheads touching passes. For a literal result, drive it from a first frame on image-to-video instead.

Default
Not specified
watermarkbooleanOptional

Asks the model to watermark the video as AI-generated, as described in the model’s own documentation. Off by default; switch it on when the place you publish requires AI-made footage to be labelled. No effect on price.

Default
false
return_last_framebooleanOptional

Also returns the clip’s final frame as a separate image next to the video. Send it to image-to-video as the next opening frame to chain shots without exporting a still yourself. Off by default; no effect on price.

Default
false
seedintegerOptional

Integer seed; omit it and each run draws its own. Fix it with everything else held constant to judge what a prompt edit actually changed. It is a comparison tool, not a promise of frame-identical repeats.

Default
Not specified
Constraints
minimum:0
maximum:2147483647
enable_web_searchbooleanOptional

Off by default. Switched on, the model may search the web for information related to your prompt before it renders. It does not change the price.

Default
false
output_formatstringOptional

The container of the returned video: mp4 (the default) or mov. Both carry the same picture; mov keeps the soundtrack as uncompressed PCM, so the file is a little larger and drops straight into editing software that prefers QuickTime. Does not change the price.

Default
"mp4"
Allowed values
"mp4""mov"
generate_audiobooleanOptional

On by default. Produces a native soundtrack synchronized to the picture — voice, room tone, movement effects. Switch it off whenever the edit will carry its own music or narration: it stops the generated track from clashing with the one you add later.

Default
true
duration_secondsintegerOptionalAffects price

4 to 30 seconds, default 5. The 30-second ceiling is the substantive change in this generation: a complete shot fits in one request instead of being chained together from closing frames. Length scales the billed quantity linearly, so confirm the motion and pacing at 5 seconds before going long.

Default
5
Allowed values
456789101112131415161718192021222324252627282930
resolutionstringOptionalAffects price

480p, 720p or 1080p, default 720p, and it feeds directly into the billed quantity. Iterate on prompts at 480p or 720p and raise the tier only for the final take. The tier you pick is the tier the model renders at — there is no upscaling or enhancement step layered on top.

Default
"720p"
Allowed values
"480p""720p""1080p"
aspect_ratiostringOptional

Defaults to `adaptive`, which lets the model choose the framing from the prompt — say "vertical short-form" and you will usually get a vertical composition. Lock a shape explicitly only when the delivery slot demands it (9:16 for feeds, 16:9 for landscape, 21:9 for widescreen); otherwise adaptive tends to compose more naturally. No effect on billing.

Default
"adaptive"
Allowed values
"21:9""16:9""4:3""1:1""3:4""9:16""adaptive"

Track the task

HTTP 202 means the task was accepted, not completed. Save the returned taskId and query that task. Do not create another task while waiting for its result.

Accepted response
HTTP/1.1 202 Accepted
Location: /api/v1/jobs/recordInfo?taskId=job_01k3m8x9q2z4v7n5p6r8s0t1w3

{
  "code": 200,
  "msg": "success",
  "request_id": "req_example_create",
  "data": {
    "taskId": "job_01k3m8x9q2z4v7n5p6r8s0t1w3",
    "state": "queued",
    "estimatedCost": "0.750000"
  }
}

The accepted response includes the estimate so your app can show the same amount in task history and billing.

Read the job
curl --get "https://api.spicyapi.ai/api/v1/jobs/recordInfo" \
  --data-urlencode "taskId=$TASK_ID" \
  -H "Authorization: Bearer $SPICY_API_KEY"

Start polling at about 2 seconds and gradually increase the interval. Stop at a terminal state. After a connection failure, query the original taskId. Retry creation only with the original idempotency key and body.

Or let the callback find you
import { verifyWebhook } from "@spicyapi/sdk";

// express.raw keeps the bytes we signed; express.json never matches.
app.post("/hooks/spicy", express.raw({ type: "application/json" }), (req, res) => {
  const { payload } = verifyWebhook({
    rawBody: req.body,
    timestamp: req.header("X-Webhook-Timestamp"),
    signature: req.header("X-Webhook-Signature"),
    payloadVersion: Number(req.header("X-Webhook-Payload-Version")),
    secret: process.env.SPICY_WEBHOOK_SECRET,
  });
  res.status(200).end();
  void handleFinishedTask(payload);
});

Pass callBackUrl when you create the task and the finished record is POSTed to you — no polling loop at all. Every delivery carries X-Webhook-Timestamp, X-Webhook-Signature and X-Webhook-Payload-Version. The signature is a base64 HMAC-SHA256 over taskId.timestamp.sha256(body), so it must be checked against the raw bytes: parsing the JSON and re-serialising it changes them and the check will fail. Failed deliveries are retried, so the same taskId can arrive twice — make the handler idempotent. Answer 2xx first and do the work afterwards; a slow handler is treated as a failed delivery.

Read the result

Consume output only when state is succeeded. On failure, use errorCode, errorMessage and request_id to investigate. Example costs and states do not represent an actual bill.

Completed response example
{
  "code": 200,
  "msg": "success",
  "request_id": "req_example_record",
  "data": {
    "taskId": "job_01k3m8x9q2z4v7n5p6r8s0t1w3",
    "model": "bytedance/seedance-2.5/text-to-video",
    "state": "succeeded",
    "output": {
      "assets": [
        {
          "key": "tasks/2026/08/28/job_01k3m8x9q2z4v7n5p6r8s0t1w3/3f7a1c9e5b2d48f0a6c1e3d5b7f9a1c3.mp4",
          "mime": "video/mp4",
          "url": "https://example.r2.cloudflarestorage.com/results/job_01k3m8x9q2z4v7n5p6r8s0t1w3/result.mp4?X-Amz-Signature=SIGNATURE_FROM_RESPONSE",
          "expiresAt": "2026-08-28T12:20:08.000Z"
        }
      ]
    },
    "cost": "0.750000",
    "settled": true,
    "createdAt": "2026-08-28T12:00:00Z",
    "completedAt": "2026-08-28T12:00:30Z"
  }
}

For each available asset, open or download assets[].url directly without an API Authorization header. The signed URL expires at expiresAt; poll the task again to refresh it while the asset remains within its retention period. A pending or unavailable asset has no URL. Treat signed URLs as private.

SDKs & integrations

Use SpicyAPI in your app, terminal, AI assistant or visual workflow. Choose a setup guide below.

SDKs
TypeScript · Python · Go · PHP · Java
CLI
Terminal commands and automation scripts.
MCP
Claude Code · Cursor · Codex
Agent Skill
Reusable instructions for your AI assistant.
n8n
Self-hosted community nodes and importable HTTP Request templates for n8n Cloud.
ComfyUI
Image, video and audio workflows on a node canvas.

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Browse ready-to-use workflows

Use it in ComfyUI

Install the SpicyAPI nodes from ComfyUI Manager or with the command below, then search for Seedance 2.5 · Text to Video on the canvas. The node has the same options as this page and shows its price before it runs.

cd ComfyUI/custom_nodes
git clone https://github.com/spicyapi-ai/comfyui-spicyapi
Workflow examplesSetup guideSource on GitHub