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POST
seedance-2-0-fast

Authorizations

Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json
model
enum<string>
required
Available options:
seedance-2-0-fast
prompt
string

Required for text-to-video; optional when visual references are provided.

Maximum string length: 5000
first_frame_image
string<url>

Optional image-to-video start frame; cannot be mixed with reference media.

last_frame_image
string<url>

Optional end frame; requires first_frame_image.

images
string<url>[]

Up to 9 reference image URLs; cannot be combined with first or last frame.

Maximum array length: 9
videos
string<url>[]

Up to 3 reference video URLs; cannot be combined with first or last frame.

Maximum array length: 3
audios
string<url>[]

Up to 3 reference audio URLs; requires at least one reference image or video and cannot be combined with first/last frame.

Maximum array length: 3
resolution
enum<string>
default:720P

Must be one of: 480P, 720P. Defaults to 720P.

Available options:
480P,
720P
duration
enum<integer>
default:5

4-15 seconds; -1 means intelligent duration. Defaults to 5. Value is in s.

Available options:
-1,
4,
5,
6,
7,
8,
9,
10,
11,
12,
13,
14,
15
size
enum<string>
default:adaptive

Fast maps explicit ratios to the correct upstream ratio/aspect_ratio field for each mode. Defaults to adaptive.

Available options:
16x9,
1x1,
21x9,
3x4,
4x3,
9x16,
adaptive
extends.audio
boolean

Enable or disable synchronized generated audio; unset uses the provider default.

Response

Business response. code=0 means the task was accepted; validation failures can return HTTP 200 with code=400.

code
enum<integer>
required
Available options:
0
Example:

0

data
object
required
msg
string
required
Example:

"success"

request_id
string<uuid>
Example:

"250b66dd-e1fb-4bb6-b5f6-c668efadc35d"