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POST
/
v1
/
videos
/
generations
Veo-3.1-Fast-Generate-Preview API
curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "veo-3.1-fast-generate-preview",
  "prompt": "A cat playing piano"
}
'
{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "veo-3.1-fast-generate-preview",
  "status": "pending"
}

Authorizations

​
Authorization
string
header
required

##All APIs require Bearer Token authentication##

Get API Key:

Visit API Key Management Page to get your API Key

Add to request header:

Authorization: Bearer YOUR_API_KEY

Body

application/json
​
model
string
default:veo-3.1-fast-generate-preview
required
Example:

"veo-3.1-fast-generate-preview"

​
prompt
string
required

Prompt describing the video, max 2000 tokens

Maximum string length: 2000
Example:

"A cat playing piano"

​
image_urls
string<uri>[]

Reference image URLs, max 3 images (FIRST&LAST mode supports 1-2, REFERENCE mode supports up to 3), max 10MB each

Maximum array length: 3
​
generation_type
enum<string>

Generation mode:

  • TEXT: Text-to-video
  • FIRST&LAST: First-last frame, 1-2 images
  • REFERENCE: Reference image, max 3 images, duration fixed at 8s, aspect ratio fixed at 16:9, except generate_audio, other advanced params not supported
Available options:
TEXT,
FIRST&LAST,
REFERENCE
​
aspect_ratio
enum<string>

Aspect ratio, default 16:9

Available options:
16:9,
9:16
​
generate_audio
boolean

Generate audio (extra cost), default true

​
duration
enum<integer>

Duration (seconds), default 4

Available options:
4,
6,
8
​
n
integer

Number of videos, default 1

Required range: 1 <= x <= 4
​
quality
enum<string>

Resolution, default 720p

Available options:
720p,
1080p,
4k
​
seed
integer
Required range: 1 <= x <= 4294967295
​
negative_prompt
string
​
person_generation
enum<string>

Person generation control, default allow_adult

Available options:
allow_adult,
dont_allow
​
resize_mode
enum<string>

Resize mode (I2V only), default pad

Available options:
pad,
crop
​
callback_url
string<uri>

Response

Video generation task created successfully

​
created
integer
Example:

1757169743

​
id
string
Example:

"task-unified-1757169743-7cvnl5zw"

​
model
string
Example:

"veo-3.1-fast-generate-preview"

​
status
enum<string>
Available options:
pending,
processing,
completed,
failed