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Endpoints

MethodEndpointDescription
POST/api/v1/generateTask/seedance-2-0-fastCreate generation task
GET/api/v1/statusTask/seedance-2-0-fastQuery task status

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Authentication

All requests require an API Key in the header: 
Authorization: Bearer YOUR_API_KEY

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Request Body

{
  "request_type": "async",
  "provider": "official",
  "input": {
    "mode": "text-to-video",
    "prompt": "a cinematic tracking shot through a rainy neon street",
    "resolution": "720p",
    "duration": 5,
    "aspect_ratio": "16:9",
    "sound": true,
    "web_search": false
  }
}

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Parameters

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request_type
string
default:"async"
async (polling) or callback (webhook)
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callback_url
string
Callback URL, required when request_type=callback (conditional)
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provider
string
default:"auto"
Routing strategy: auto, value, or official
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input
object
required
Model input parameters
Mode Options:
  • text-to-video — Generate video from text prompt only
  • first_and_last_frames — Generate video from first frame or first+last frame images. Requires image_urls.
  • omni_reference — Multimodal reference generation combining images, videos, and audio
Constraints:
  • first_and_last_frames requires image_urls with 1-2 images.
  • omni_reference supports image_urls (max 9), video_urls (max 3), audio_urls (max 3).
  • omni_reference with only audio_urls (no images or videos) will fail.
  • Each reference video and audio must be 2-15 seconds. Total duration per type cannot exceed 15 seconds.

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Example

Text-to-Video 
curl -X POST "https://api.apixo.ai/api/v1/generateTask/seedance-2-0-fast" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "provider": "official",
    "input": {
      "mode": "text-to-video",
      "prompt": "a cinematic tracking shot through a rainy neon street",
      "resolution": "720p",
      "duration": 5,
      "aspect_ratio": "16:9",
      "sound": true,
      "web_search": false
    }
  }'
First and Last Frames 
curl -X POST "https://api.apixo.ai/api/v1/generateTask/seedance-2-0-fast" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "callback",
    "callback_url": "https://your-server.com/callback",
    "provider": "official",
    "input": {
      "mode": "first_and_last_frames",
      "prompt": "turn the still frames into a smooth cinematic camera move",
      "image_urls": [
        "https://example.com/frame-start.png",
        "https://example.com/frame-end.png"
      ],
      "resolution": "720p",
      "duration": 5,
      "aspect_ratio": "9:16",
      "sound": true
    }
  }'
Omni Reference 
curl -X POST "https://api.apixo.ai/api/v1/generateTask/seedance-2-0-fast" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "provider": "official",
    "input": {
      "mode": "omni_reference",
      "prompt": "create a stylish product ad using the visual references and voice rhythm",
      "image_urls": [
        "https://example.com/product-shot.png"
      ],
      "video_urls": [
        "https://example.com/ref-motion.mp4"
      ],
      "audio_urls": [
        "https://example.com/ref-audio.mp3"
      ],
      "resolution": "480p",
      "duration": 6,
      "aspect_ratio": "auto",
      "sound": true,
      "web_search": false
    }
  }'

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Response

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POST /api/v1/generateTask/seedance-2-0-fast

Returns taskId on success for subsequent status queries. Success: 
{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678"
  }
}

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GET /api/v1/statusTask/seedance-2-0-fast

Query task execution status and results via taskId. 
curl -X GET "https://api.apixo.ai/api/v1/statusTask/seedance-2-0-fast?taskId=task_12345678" \
  -H "Authorization: Bearer YOUR_API_KEY"
Success: 
{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "success",
    "resultJson": "{\"resultUrls\":[\"https://r2.apixo.ai/video.mp4\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965670929,
    "costTime": 60000
  }
}
Failure: 
{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "failed",
    "failCode": "UPSTREAM_ERROR",
    "failMsg": "Upstream error message"
  }
}

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Status Response Fields

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taskId
string
Unique task identifier.
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state
string
Current task state: pending, processing, processing_r2, success, or failed.
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resultJson
string
JSON string containing resultUrls array. Only present on success. Parse with JSON.parse().
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failCode
string
Error code. Only present when state is failed. See Error Codes.
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failMsg
string
Human-readable error message. Only present when state is failed.
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createTime
integer
Task creation timestamp (Unix milliseconds).
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completeTime
integer
Task completion timestamp (Unix milliseconds).
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costTime
integer
Processing duration in milliseconds.

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Error Codes

CodeDescription
400Invalid parameters or request error
401Invalid or missing API Key
429Rate limit exceeded
Fail CodeDescription
Provider-specificReturned in data.failCode when task execution fails

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Billing

  • Billing unit: PER_SECOND
  • Duration range: 4-15 seconds
  • Without video reference: output video seconds × per-second rate
  • With video reference: (input video seconds + output video seconds) × per-second rate
ConfigurationPrice (per second)
480p, without video reference$0.11
480p, with video reference$0.08
720p, without video reference$0.22
720p, with video reference$0.14
  • “With video reference” applies when mode=omni_reference and video_urls is provided.
  • text-to-video and first_and_last_frames always use “without video reference” pricing.

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Rate Limits

LimitDescription
DefaultFollows the API Key level rate limits configured for your account

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Tips

APIXO Exclusive — Unlimited Concurrency: APIXO is the only provider offering Seedance 2.0 Fast with no concurrency limits. Submit as many parallel tasks as your workflow demands.
APIXO Exclusive — Real-Person Portraits: APIXO exclusively supports generating videos with real human portraits and copyrighted material in reference images. Note: reference videos cannot contain faces.
APIXO Exclusive — Hidden Capabilities: APIXO unlocks additional model capabilities not available through other providers, giving you access to the full potential of Seedance 2.0 Fast.
Seedance 2.0 Fast supports three modes: text-to-video for prompt-only, first_and_last_frames for keyframe animation, and omni_reference for multimodal creation with images, videos, and audio.
Average generation time is 3-6 minutes. Wait about 200-300 seconds before the first status poll, then poll every 10-20 seconds.
For production, prefer callback mode to reduce polling overhead.
For omni_reference with video_urls, billing uses (input video seconds + output video seconds) × per-second rate. See the Billing section for all tiers.
Result URLs are temporary. Download generated videos promptly after task completion.
Enable web_search=true to let the model reference current information during generation.