SJolt

ByteDance

Seedance 2.5 Preview

Create videos up to 30 seconds, combine as many as 50 multimodal references, and refine specific moments with frame-level control.

Text to video
POSThttps://sjolt.ai/sjolt-ai/v1/bytedance/seedance-2.5/text-to-video

Seedance 2.5 Preview Text to Video API

Create a Seedance 2.5 Preview video task through the sjolt public API.

bash
curl https://sjolt.ai/sjolt-ai/v1/bytedance/seedance-2.5/text-to-video \
  -H "Authorization: Bearer $SJOLT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "input": {
    "prompt": "A cinematic tracking shot through a neon-lit night market after rain, with natural crowd movement and synchronized ambience.",
    "duration": 10,
    "aspect_ratio": "9:16",
    "resolution": "720p"
  },
  "webhook": "https://example.com/webhook"
}'

Parameters

NameRequiredTypeNotes
promptYesstringNon-empty instructions up to 10,000 characters.
durationNointeger4 to 30 seconds. Defaults to 5.
aspect_ratioNostring16:9, 9:16, 1:1, 3:4, 4:3, 21:9. Defaults to 16:9.
resolutionNostring480p or 720p. Defaults to 480p.

| webhook | No | string | Top-level callback URL. |

The reference route requires at least one non-empty reference array. The text route rejects reference-media fields.

Query a task

bash
curl https://sjolt.ai/sjolt-ai/v1/tasks/{task_id} \
  -H "Authorization: Bearer $SJOLT_API_KEY"

Status values are 0 for running, 1 for succeeded, and 2 for failed. Generated MP4 URLs are returned in data.output_urls.

Webhook callback

If you include a top-level webhook URL in the create-task request, sjolt sends a best-effort POST to that URL when the task reaches a terminal state.

http
Content-Type: application/json

Succeeded callback:

json
{
  "task_id": "gen_7nz4q8x2",
  "status": "succeeded",
  "output": {
    "output_url_list": [
      "https://file.sjolt.ai/output/result.png"
    ]
  },
  "error": null
}

Failed callback:

json
{
  "task_id": "gen_7nz4q8x2",
  "status": "failed",
  "output": {
    "output_url_list": []
  },
  "error": "failure reason"
}

Webhook delivery is best-effort. Query https://sjolt.ai/sjolt-ai/v1/tasks/{task_id} for final status and result URLs.