doubao-seedance-2.0

Quick example

curl https://reapi.ai/api/v1/videos/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seedance-2.0-face",
    "prompt": "A kitten yawning at the camera, cinematic warm tones",
    "resolution": "720p",
    "size": "16:9",
    "duration": 5
  }'

import requests

resp = requests.post(
    "https://reapi.ai/api/v1/videos/generations",
    headers={
        "Authorization": "Bearer YOUR_API_KEY",
        "Content-Type": "application/json",
    },
    json={
        "model": "doubao-seedance-2.0-face",
        "prompt": "A kitten yawning at the camera, cinematic warm tones",
        "resolution": "720p",
        "size": "16:9",
        "duration": 5,
    },
    timeout=30,
)
print(resp.json())

const r = await fetch("https://reapi.ai/api/v1/videos/generations", {
  method: "POST",
  headers: {
    Authorization: "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "doubao-seedance-2.0-face",
    prompt: "A kitten yawning at the camera, cinematic warm tones",
    resolution: "720p",
    size: "16:9",
    duration: 5,
  }),
});
console.log(await r.json());

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "io"
    "net/http"
)

func main() {
    body, _ := json.Marshal(map[string]any{
        "model":      "doubao-seedance-2.0-face",
        "prompt":     "A kitten yawning at the camera, cinematic warm tones",
        "resolution": "720p",
        "size":       "16:9",
        "duration":   5,
    })
    req, _ := http.NewRequest("POST",
        "https://reapi.ai/api/v1/videos/generations", bytes.NewReader(body))
    req.Header.Set("Authorization", "Bearer YOUR_API_KEY")
    req.Header.Set("Content-Type", "application/json")

    resp, _ := http.DefaultClient.Do(req)
    defer resp.Body.Close()
    out, _ := io.ReadAll(resp.Body)
    fmt.Println(string(out))
}

Authentication

Every call needs a Bearer token. Generate keys at reapi.ai/settings/apikeys.

Authorization: Bearer YOUR_API_KEY

Keys carry the active workspace's billing scope — there is no separate project header.

Endpoint

POST /api/v1/videos/generations
GET  /api/v1/tasks/{id}

Submission is async. The POST returns immediately with a task_id; the task endpoint returns the same envelope until completion. Polling does not consume credits.

Variants

Three variants, one parameter shape. Pick via model:

All three accept real-person reference images and clips, and all three carry the content_filter switch. The Fast variant is cheaper and quicker and caps at 720p.

doubao-seedance-2.0-eco is the economy tier: the same request body and the same modes, starting at 720p rather than 480p. It bills on its own per-second rates — see the model page for the current numbers.

reAPI never silently substitutes one variant for another: resolution: "1080p" on the Fast variant returns 400, never an auto-downgraded clip. The same holds for resolution: "480p" on the economy tier.

Request body

Mode is implicit — which media fields you set decides text-to-video, image-to-video, first/last-frame, or reference-driven generation (see Task types). Face variants accept real-person reference images and clips.

Checked before anything is submitted or charged:

• prompt is present on every request (3–20000 chars)
• image_urls and image_with_roles are mutually exclusive (both carry reference images — pick one)
• at most one first_frame and one last_frame, and a last_frame always needs a first_frame (there is no last-frame-only task type)
• frame roles and reference_image cannot share one image_with_roles array, and frame roles cannot be combined with video_urls / audio_urls
• audio_urls needs a visual reference (an image or a clip) alongside it
• reference clips: 3 max, 15 s combined; reference audio: each 2–15 s, 3 max, 15 s combined
• 1080p / 4k and -1 only on doubao-seedance-2.0-face

There is no seed on Seedance 2.0 — the upstream model does not support one, so the field is rejected rather than silently ignored.

bitrate_mode — enum, default "default"

Available across Seedance 2.0, Fast, Mini, and 2.5, including all channels. This is reAPI output processing after generation.

• "default" or omitted: return the original file without processing or re-encoding. This is the default setting.
• "standard": compress for smaller files and faster downloads.
• "high": apply lighter compression to retain more detail than standard, usually producing a larger file. It does not enhance the original video.

Processing preserves resolution, frame timing, audio, and the MP4/MOV container. If encoding would increase file size, the original file is kept. The generation charge is unchanged. Processing adds time and supports source files up to 1 GiB; savings vary by video.

Legacy booleans remain accepted: false maps to "default", and true maps to "standard". Other values return 400 before charging. Processing or storage failures follow the existing task failure/refund policy; an unprocessed source URL is not silently substituted after a processing failure.

{ "bitrate_mode": "default" }

content_filter — boolean, default true

With the default (true) the request runs on the moderated route: prompts, reference material and output are checked, and a rejection fails the task with a refund.

Set content_filter: false to run the same request on the unmoderated route instead. What changes:

• API keys only. A website session that sends content_filter: false is rejected with 400 before anything is charged; the playground always runs moderated.
• Same parameters, same price. Every field, tier gate and rate in this document applies unchanged — which channel served the request is internal. On the Fast variant the route still caps at 720p.
• 4k gains auto duration. duration: -1 at 4k is only available with content_filter: false; with the filter on, pick an explicit duration for 4k.
• Output lands in an isolated bucket and its URLs stay valid for 30 days — mirror the files if you need them longer.

Platform terms apply to everything you generate on either route.

{
  "model": "doubao-seedance-2.0-face",
  "prompt": "A kitten yawning at the camera, cinematic warm tones",
  "resolution": "720p",
  "duration": 5,
  "content_filter": false
}

Task types and constraints

Seedance 2.0 picks its job from the media fields you send — there is no mode parameter:

Troubleshooting

Response envelope

Submit and poll share the same shape — only status and output fill in over time.

{
  "id": "task_018f5a3a1b6e7d9f8c2b4d6e8f0a2c4e",
  "model": "doubao-seedance-2.0-face",
  "status": "completed",
  "created_at": 1735000000,
  "output": {
    "video_urls": ["https://cdn.reapi.ai/media/tasks/.../0.mp4"],
    "last_frame_url": "https://cdn.reapi.ai/media/tasks/.../0.png"
  },
  "error": null
}

Poll GET /api/v1/tasks/{id} (see the Tasks reference) until status === "completed". Generated URLs expire — mirror them to your own storage if you need long-term retention.

Validation errors

All cases below return HTTP 400 with the noted code. Pattern-match on code, not message — message strings carry request-specific context (field names, observed values) and are not a stable contract.

The full envelope is { "error": { "code", "message", "request_id" } } — see the Errors catalog for wire format and request_id correlation.

Pricing

Seedance 2.0 bills per second of video, at a rate that depends on three axes:

• Variant — doubao-seedance-2.0-face or doubao-seedance-2.0-fast-face
• Resolution — 480p / 720p / 1080p / 4k
• Mode — text (no media references) or ref (any of image_urls, image_with_roles, video_urls, audio_urls is set); ref rates are lower than text rates at every cell

credits = ceil(per_second_rate × billable_seconds × 1000)     1 credit = $0.001

Live per-second rates are on the model page — that table is generated from the current price, so it is always the authoritative number. Failed jobs are always refunded in full. Two rules make billable_seconds differ from the duration you asked for.

1. A reference video is billed too, on top of the output

Send video_urls and you pay for the source footage plus the generated clip:

billable_seconds = ceil(total_length_of_video_urls) + duration

reAPI measures every reference clip server-side, so this is the real length of the file, not a value you declare. Reference images and audio are free — they add no seconds. A 5-second source clip with duration: 6 bills 11 seconds, not 6; the same request without video_urls bills 6 seconds at the (higher) text rate.

2. duration: -1 reserves at 15 seconds, then refunds

-1 asks the model to choose the length, so there is no number to price at submit. reAPI reserves credits at the 15-second cap and settles to the real length once the video is delivered — the difference is refunded automatically. This is why a -1 request can return 402 on an account that could afford the video it actually produces: the reserve, not the final price, has to fit.

Recipes

Text-to-video:

{
  "model": "doubao-seedance-2.0-face",
  "prompt": "A kitten yawning at the camera, slow push-in, warm tones",
  "resolution": "720p",
  "size": "16:9",
  "duration": 5
}

First / last frame transition:

{
  "model": "doubao-seedance-2.0-face",
  "prompt": "Smooth transition from day to night",
  "image_with_roles": [
    { "url": "https://your-cdn.com/day.jpg",   "role": "first_frame" },
    { "url": "https://your-cdn.com/night.jpg", "role": "last_frame"  }
  ],
  "duration": 5
}

Reference clip plus reference audio (both billed: the clip's length on top of duration):

{
  "model": "doubao-seedance-2.0-face",
  "prompt": "A scene of a person speaking",
  "video_urls": ["https://your-cdn.com/reference.mp4"],
  "audio_urls": ["https://your-cdn.com/speech.wav"],
  "size": "16:9",
  "duration": 11
}

Continuous chain — ask for the last frame, then feed it to the next call as image_urls:

{
  "model": "doubao-seedance-2.0-face",
  "prompt": "The kitten approaches the camera",
  "image_urls": ["https://your-cdn.com/kitten-start.png"],
  "return_last_frame": true
}

Related

• Errors catalog
• Authentication
• Quickstart
• Seedance 2.0 Mini
• Seedance 2.5