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POST
/
wan
/
api
/
v1
/
services
/
aigc
/
video-generation
/
video-synthesis
Text-to-Video: create a video generation task from a text prompt
curl --request POST \
  --url https://api.apiyi.com/wan/api/v1/services/aigc/video-generation/video-synthesis \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-DashScope-Async: <x-dashscope-async>' \
  --data '
{
  "model": "happyhorse-1.0-t2v",
  "input": {
    "prompt": "A cat running across a meadow, bright sunshine, camera following, cinematic lighting"
  }
}
'
{
  "output": {
    "task_id": "hh-12ab34cd-...",
    "task_status": "PENDING"
  },
  "request_id": "..."
}

Documentation Index

Fetch the complete documentation index at: https://docs.apiyi.com/llms.txt

Use this file to discover all available pages before exploring further.

You can debug directly in the Playground on the right: fill in Authorization with Bearer sk-your-api-key, set model / input / parameters, then send the request. A successful submission returns a task_id; see below for polling and downloading.
This page covers the create endpoint for happyhorse-1.0-t2v (Text-to-Video) and needs only a text prompt. For the complete async flow, status table, and Python client, see the HappyHorse Overview.
  • The create request must go to /wan/api/v1/services/aigc/video-generation/video-synthesis with the request header X-DashScope-Async: enable. Do not use /v1/videos.
  • duration must be an integer (5, not "5"); write resolution in uppercase 720P.

​
Code Examples

curl -X POST "https://api.apiyi.com/wan/api/v1/services/aigc/video-generation/video-synthesis" \
  -H "X-DashScope-Async: enable" \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "happyhorse-1.0-t2v",
    "input": {
      "prompt": "A cat running across a meadow, bright sunshine, camera following, cinematic lighting"
    },
    "parameters": {
      "resolution": "720P",
      "duration": 5,
      "prompt_extend": true,
      "watermark": true
    }
  }'

​
Parameter Quick Reference

ParameterTypeRequiredDefaultNotes
modelstring✓—Fixed to happyhorse-1.0-t2v
input.promptstring✓—Text prompt; describe scene, camera movement, lighting, and style
parameters.resolutionstring720P720P / 1080P (uppercase)
parameters.durationint5Integer of 2–15 seconds
parameters.prompt_extendbooltrueSmart rewriting, recommended on
parameters.watermarkboolfalse”AI Generated” watermark in the bottom-right corner
parameters.seedintrandom0–2147483647, fix for reproducibility

​
Response Format

A successful creation returns a task_id (not the video itself): 
{
  "output": { "task_id": "...", "task_status": "PENDING" },
  "request_id": "..."
}
After submission, you must poll GET /v1/tasks/{task_id} until status: "completed", then download the mp4 from the result_url in the response. When downloading, do not include the Authorization header (it’s a signed OSS direct link), and result_url expires in 24 hours by default. See the full polling loop in HappyHorse Overview · Async Call Flow.

Authorizations

​
Authorization
string
header
required

The API Key obtained from the APIYI Console

Headers

​
X-DashScope-Async
enum<string>
default:enable
required

Async processing switch, must be set to enable

Available options:
enable

Body

application/json
​
model
enum<string>
default:happyhorse-1.0-t2v
required

Model ID, fixed to happyhorse-1.0-t2v for Text-to-Video

Available options:
happyhorse-1.0-t2v
​
input
object
required
​
parameters
object

Response

Task submitted, returns task_id and PENDING status

​
output
object
​
request_id
string

Unique request identifier

Example:

"..."