seedance-2.0 API

Use the exact model ID seedance-2.0. The model field must match this page exactly.

Authentication and endpoint

Use a Modelflare API key with https://modelflare.dev/v1. The gateway entry point is POST /v1/videos.

HTTP

Authorization: Bearer YOUR_MODELFLARE_API_KEY

Create a task

bash

curl https://modelflare.dev/v1/videos \
  -H "Authorization: Bearer YOUR_MODELFLARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.0",
    "content": [{"type": "text", "text": "A white cat runs through a neon-lit street in the rain, cinematic tracking shot"}],
    "resolution": "720p",
    "duration": 5,
    "generate_audio": false
  }'

Poll and download

Save the task ID. Poll GET /v1/videos/{task_id} and download with GET /v1/videos/{task_id}/content. Result URLs may expire, so transfer the file promptly.

bash

curl https://modelflare.dev/v1/videos/TASK_ID \
  -H "Authorization: Bearer YOUR_MODELFLARE_API_KEY"

Request notes

Seedance uses content[] for text, frames, and reference media; asset-management and tool-management endpoints are outside this model-call guide.

Request parameters

Seedance uses one asynchronous multimodal envelope. Put text and media in content[]; media roles select first/last-frame or reference workflows.

Field	Required	Notes
model	Yes	seedance-2.0
content[]	Yes	text, image_url, video_url, and audio_url; use role to identify media purpose
resolution	No	480p / 720p / 1080p / 4k
ratio	No	21:9 / 16:9 / 4:3 / 1:1 / 3:4 / 9:16 / adaptive
duration	No	Seconds; use the enum documented for this model
generate_audio	No	Generate synchronized dialogue, effects, and background audio
tools	No	Use web_search only where the official model page supports it
watermark	No	Whether to add a watermark

Input and output limits

This model supports 480p, 720p, 1080p, and 4k output with a 4–15 second duration. Mark reference media with role values in content[]; editing and extension constraints differ from ordinary text-to-video.

Supported scope

This page covers Modelflare model generation and editing calls. Search or map enrichment, voice management, and element-library management are resource APIs outside this public model-call surface and are not required request fields.

Pricing and billing

This model uses token-based billing. See the model pricing page for the current customer price, reference list price, and complete specification.

Note

This page documents Modelflare’s public interface; the fields and limits shown here are the current contract.

Variants

Model ID	Difference
seedance-2.0	The model documented on this page.
seedance-2.0-nsfw	NSFW variant. Same endpoint, request contract, and billing unit; only the model ID changes. See the pricing page for price and availability.