seedance-2-fast-ext Video Generation
curl --request POST \
--url https://toapis.com/v1/videos/generations \
--header 'Authorization: <authorization>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "<string>",
"prompt": "<string>",
"seconds": 123,
"size": "<string>",
"resolution": "<string>",
"reference_image": "<string>",
"reference_images": [
"<string>"
],
"callback_url": "<string>",
"client_business_id": "<string>",
"trace_id": "<string>"
}
'import requests
url = "https://toapis.com/v1/videos/generations"
payload = {
"model": "<string>",
"prompt": "<string>",
"seconds": 123,
"size": "<string>",
"resolution": "<string>",
"reference_image": "<string>",
"reference_images": ["<string>"],
"callback_url": "<string>",
"client_business_id": "<string>",
"trace_id": "<string>"
}
headers = {
"Authorization": "<authorization>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: '<authorization>', 'Content-Type': 'application/json'},
body: JSON.stringify({
model: '<string>',
prompt: '<string>',
seconds: 123,
size: '<string>',
resolution: '<string>',
reference_image: '<string>',
reference_images: ['<string>'],
callback_url: '<string>',
client_business_id: '<string>',
trace_id: '<string>'
})
};
fetch('https://toapis.com/v1/videos/generations', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://toapis.com/v1/videos/generations",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'model' => '<string>',
'prompt' => '<string>',
'seconds' => 123,
'size' => '<string>',
'resolution' => '<string>',
'reference_image' => '<string>',
'reference_images' => [
'<string>'
],
'callback_url' => '<string>',
'client_business_id' => '<string>',
'trace_id' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Authorization: <authorization>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://toapis.com/v1/videos/generations"
payload := strings.NewReader("{\n \"model\": \"<string>\",\n \"prompt\": \"<string>\",\n \"seconds\": 123,\n \"size\": \"<string>\",\n \"resolution\": \"<string>\",\n \"reference_image\": \"<string>\",\n \"reference_images\": [\n \"<string>\"\n ],\n \"callback_url\": \"<string>\",\n \"client_business_id\": \"<string>\",\n \"trace_id\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "<authorization>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://toapis.com/v1/videos/generations")
.header("Authorization", "<authorization>")
.header("Content-Type", "application/json")
.body("{\n \"model\": \"<string>\",\n \"prompt\": \"<string>\",\n \"seconds\": 123,\n \"size\": \"<string>\",\n \"resolution\": \"<string>\",\n \"reference_image\": \"<string>\",\n \"reference_images\": [\n \"<string>\"\n ],\n \"callback_url\": \"<string>\",\n \"client_business_id\": \"<string>\",\n \"trace_id\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://toapis.com/v1/videos/generations")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = '<authorization>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"model\": \"<string>\",\n \"prompt\": \"<string>\",\n \"seconds\": 123,\n \"size\": \"<string>\",\n \"resolution\": \"<string>\",\n \"reference_image\": \"<string>\",\n \"reference_images\": [\n \"<string>\"\n ],\n \"callback_url\": \"<string>\",\n \"client_business_id\": \"<string>\",\n \"trace_id\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"id": "tsk_vid_xxx",
"object": "generation.task",
"model": "seedance-2-fast-ext",
"status": "in_progress",
"progress": 10,
"created_at": 1781577600
}
seedance-ext
seedance-2-fast-ext Video Generation
Generate videos quickly at low cost with the seedance-2-fast-ext model
POST
/
v1
/
videos
/
generations
seedance-2-fast-ext Video Generation
curl --request POST \
--url https://toapis.com/v1/videos/generations \
--header 'Authorization: <authorization>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "<string>",
"prompt": "<string>",
"seconds": 123,
"size": "<string>",
"resolution": "<string>",
"reference_image": "<string>",
"reference_images": [
"<string>"
],
"callback_url": "<string>",
"client_business_id": "<string>",
"trace_id": "<string>"
}
'import requests
url = "https://toapis.com/v1/videos/generations"
payload = {
"model": "<string>",
"prompt": "<string>",
"seconds": 123,
"size": "<string>",
"resolution": "<string>",
"reference_image": "<string>",
"reference_images": ["<string>"],
"callback_url": "<string>",
"client_business_id": "<string>",
"trace_id": "<string>"
}
headers = {
"Authorization": "<authorization>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: '<authorization>', 'Content-Type': 'application/json'},
body: JSON.stringify({
model: '<string>',
prompt: '<string>',
seconds: 123,
size: '<string>',
resolution: '<string>',
reference_image: '<string>',
reference_images: ['<string>'],
callback_url: '<string>',
client_business_id: '<string>',
trace_id: '<string>'
})
};
fetch('https://toapis.com/v1/videos/generations', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://toapis.com/v1/videos/generations",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'model' => '<string>',
'prompt' => '<string>',
'seconds' => 123,
'size' => '<string>',
'resolution' => '<string>',
'reference_image' => '<string>',
'reference_images' => [
'<string>'
],
'callback_url' => '<string>',
'client_business_id' => '<string>',
'trace_id' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Authorization: <authorization>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://toapis.com/v1/videos/generations"
payload := strings.NewReader("{\n \"model\": \"<string>\",\n \"prompt\": \"<string>\",\n \"seconds\": 123,\n \"size\": \"<string>\",\n \"resolution\": \"<string>\",\n \"reference_image\": \"<string>\",\n \"reference_images\": [\n \"<string>\"\n ],\n \"callback_url\": \"<string>\",\n \"client_business_id\": \"<string>\",\n \"trace_id\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "<authorization>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://toapis.com/v1/videos/generations")
.header("Authorization", "<authorization>")
.header("Content-Type", "application/json")
.body("{\n \"model\": \"<string>\",\n \"prompt\": \"<string>\",\n \"seconds\": 123,\n \"size\": \"<string>\",\n \"resolution\": \"<string>\",\n \"reference_image\": \"<string>\",\n \"reference_images\": [\n \"<string>\"\n ],\n \"callback_url\": \"<string>\",\n \"client_business_id\": \"<string>\",\n \"trace_id\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://toapis.com/v1/videos/generations")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = '<authorization>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"model\": \"<string>\",\n \"prompt\": \"<string>\",\n \"seconds\": 123,\n \"size\": \"<string>\",\n \"resolution\": \"<string>\",\n \"reference_image\": \"<string>\",\n \"reference_images\": [\n \"<string>\"\n ],\n \"callback_url\": \"<string>\",\n \"client_business_id\": \"<string>\",\n \"trace_id\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"id": "tsk_vid_xxx",
"object": "generation.task",
"model": "seedance-2-fast-ext",
"status": "in_progress",
"progress": 10,
"created_at": 1781577600
}
seedance-2-fast-ext is the volume promotional-channel model in the Seedance 2.0 family, designed for low-cost, fast generation:
- Text-to-video and reference-image generation
- Supports
480p,720p, and1080poutput - Reference videos, reference audios, first/last-frame control, and video editing are not supported
- The API is asynchronous: submitting returns a
generation.task; fetch results via the video task status endpoint.
Authentication
string
required
All requests require a Bearer Token. Get your key from the API Key management page and add it to the request header:
Authorization: Bearer YOUR_API_KEY
Body
string
default:"seedance-2-fast-ext"
required
ToAPIs public model name. Always use
seedance-2-fast-ext.string
Describe the scene, camera movement, subject actions, style, and sound atmosphere.
integer
default:"5"
Output video duration in seconds. Only
5, 10, and 15 are supported. The compatible field duration is also accepted; do not pass both.string
Output aspect ratio. Supported:
16:9, 9:16, 4:3, 3:4, 1:1. The compatible field aspect_ratio is also accepted.string
default:"720p"
Output resolution. Supported:
480p, 720p, and 1080p.string
Public URL of a single reference image. For multiple images use
reference_images.string[]
Array of reference image URLs, up to
9. You can also use image_with_roles with role set to reference_image.string
ToAPIs task completion callback URL. See Task Webhooks.
string
Your order number or business task ID. Stored with the task; you can also query it via
GET /v1/videos/generations/{client_business_id}.string
Custom trace ID for request tracking.
Media Combination Rules
| Request content | Supported | Notes |
|---|---|---|
| Prompt only | Yes | Text-to-video |
| Reference images | Yes | Up to 9 |
| Reference video / reference audio | No | Use seedance-2.5-ext instead |
| First / last frame | No | Frame mode is not supported |
Request Examples
Text-to-Video
curl --request POST \
--url https://toapis.com/v1/videos/generations \
--header 'Authorization: Bearer YOUR_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
"model": "seedance-2-fast-ext",
"prompt": "Waves crashing on rocks, camera slowly orbiting in.",
"seconds": 5,
"size": "16:9",
"resolution": "720p"
}'
Reference Image
curl --request POST \
--url https://toapis.com/v1/videos/generations \
--header 'Authorization: Bearer YOUR_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
"model": "seedance-2-fast-ext",
"prompt": "The character in image 1 blinks and smiles.",
"seconds": 5,
"size": "9:16",
"resolution": "480p",
"reference_images": [
"https://example.com/avatar.png"
]
}'
Response
string
Task ID for status queries.
string
Returned when provided in the request.
string
Fixed to
generation.task.string
The model used for this request.
string
queued, in_progress, completed, or failed.integer
Task progress from
0 to 100.integer
Creation timestamp.
{
"id": "tsk_vid_xxx",
"object": "generation.task",
"model": "seedance-2-fast-ext",
"status": "in_progress",
"progress": 10,
"created_at": 1781577600
}