HappyHorse-1.1-T2V - Generate Video (AI Model · By )

API Documentation

API Reference

Videos

Generate Video

Supported Model Code

Loading models...

HappyHorse-1.1-T2V (happyhorse-1.1-t2v)

happyhorse-1.1-t2v0 models support this endpoint

HappyHorse 1.1 Text-to-Video turns a written prompt into a polished, ready-to-share video clip. Describe the scene, action, mood, and style you want — "a panda astronaut drifting through a glowing nebula," "liquid gold pouring through an ornate hourglass in slow motion" — and HappyHorse interprets the subjects, motion, and cinematic context to render coherent footage with natural movement and stable detail. It accepts prompts in any language, lets you pick from nine aspect ratios (16:9, 9:16, 1:1, 4:3, 3:4, 4:5, 5:4, 21:9, 9:21) and output at 720P or 1080P, with durations from 3 to 15 seconds and an optional watermark — production-ready clips for ads, social media, and creative storytelling.

Generate video

https://api.modelstream.ai

POST/v1/video/generations

Authentication

BearerAuth

AuthenticationBearer <token>

All API requests must be authenticated using a Bearer token in the Authorization header. Please ensure your API key is active.Authorization: Bearer sk-xxxxxx

Parameter Location: Header Param

Request Body

application/json

These parameters come from the selected model form_schema. Switching models updates this list and the request example.

prompt*string

Describe the video scene, action, and art style you want to generate. Supports Chinese and English. Up to 2500 Chinese characters or 5000 non-Chinese characters.

RequiredExample Value: A cinematic, extreme close-up video of a giant, ornate hourglass standing on a mahogany table. Inside, instead of sand, flowing liquid gold mixed with glowing sapphire dust falls through the narrow neck. As the liquid hits the bottom, it splashes in slow motion, creating crown-shaped ripples that freeze into intricate crystalline structures. The glass of the hourglass is etched with moving astrological symbols that glow with a soft white light. Outside the glass, wisps of thick, purple incense smoke curl and drift lazily around the frame. The lighting is warm and flickering, as if from a nearby fireplace, creating deep amber highlights and long, dancing shadows. 4k, 60fps, shallow depth of field with heavy bokeh, focus on the fluid dynamics of the falling gold and the texture of the carved wood.Placeholder: Example: A cute panda in a spacesuit floating in space, with a colorful nebula in the background...

ratio?string

Video aspect ratio; options 16:9, 9:16, 1:1, 4:3, 3:4, 4:5, 5:4, 21:9, 9:21. Default 16:9.

Example Value: 16:9

Enum/Options:

16:99:161:14:33:44:55:421:99:21

resolution?string

Video output resolution; options 720P, 1080P, default 1080P.

Example Value: 1080P

Enum/Options:

1080P720P

duration?number

Video duration in seconds; range 3-15 seconds, default 5.

Example Value: 5Value Range: 3 ≤ value ≤ 15step: 1

watermark?boolean

Whether to add the "Happy Horse" watermark to the bottom-right of the video. Enabled by default.

Example Value: true

seed?number

Random seed, range [0, 2147483647]. A fixed integer improves reproducibility; leave empty for a random seed.

Placeholder: Leave empty for a random seedValue Range: 0 ≤ value ≤ 2147483647

Response Parameters

application/json

200apiDocs.responses.successCreateVideoGenTask

task_id?string

Parameter description for Task Id

status?string

Parameter description for Status

400apiDocs.responses.badRequestParams

error?object

Parameter description for Error

message?string

Error Message

type?string

Error Type

param?string

Related Parameters

code?string

Error Code

curl -X POST "https://api.modelstream.ai/v1/video/generations" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "happyhorse-1.1-t2v",
  "prompt": "A cinematic, extreme close-up video of a giant, ornate hourglass standing on a mahogany table. Inside, instead of sand, flowing liquid gold mixed with glowing sapphire dust falls through the narrow neck. As the liquid hits the bottom, it splashes in slow motion, creating crown-shaped ripples that freeze into intricate crystalline structures. The glass of the hourglass is etched with moving astrological symbols that glow with a soft white light. Outside the glass, wisps of thick, purple incense smoke curl and drift lazily around the frame. The lighting is warm and flickering, as if from a nearby fireplace, creating deep amber highlights and long, dancing shadows. 4k, 60fps, shallow depth of field with heavy bokeh, focus on the fluid dynamics of the falling gold and the texture of the carved wood.",
  "size": "1080P",
  "duration": 5,
  "metadata": {
    "parameters": {
      "ratio": "16:9",
      "watermark": true
    }
  }
}'

{
  "task_id": "abcd1234efgh",
  "status": "queued"
}

API Documentation

API Reference

Videos

Generate Video

Supported Model Code

Loading models...

HappyHorse-1.1-T2V (happyhorse-1.1-t2v)

happyhorse-1.1-t2v0 models support this endpoint

Generate video

https://api.modelstream.ai

POST/v1/video/generations

Authentication

BearerAuth

AuthenticationBearer <token>

All API requests must be authenticated using a Bearer token in the Authorization header. Please ensure your API key is active.Authorization: Bearer sk-xxxxxx

Parameter Location: Header Param

Request Body

application/json

These parameters come from the selected model form_schema. Switching models updates this list and the request example.

prompt*string

Describe the video scene, action, and art style you want to generate. Supports Chinese and English. Up to 2500 Chinese characters or 5000 non-Chinese characters.

ratio?string

Video aspect ratio; options 16:9, 9:16, 1:1, 4:3, 3:4, 4:5, 5:4, 21:9, 9:21. Default 16:9.

Example Value: 16:9

Enum/Options:

16:99:161:14:33:44:55:421:99:21

resolution?string

Video output resolution; options 720P, 1080P, default 1080P.

Example Value: 1080P

Enum/Options:

1080P720P

duration?number

Video duration in seconds; range 3-15 seconds, default 5.

Example Value: 5Value Range: 3 ≤ value ≤ 15step: 1

watermark?boolean

Whether to add the "Happy Horse" watermark to the bottom-right of the video. Enabled by default.

Example Value: true

seed?number

Random seed, range [0, 2147483647]. A fixed integer improves reproducibility; leave empty for a random seed.

Placeholder: Leave empty for a random seedValue Range: 0 ≤ value ≤ 2147483647

Response Parameters

application/json

200apiDocs.responses.successCreateVideoGenTask

task_id?string

Parameter description for Task Id

status?string

Parameter description for Status

400apiDocs.responses.badRequestParams

error?object

Parameter description for Error

message?string

Error Message

type?string

Error Type

param?string

Related Parameters

code?string

Error Code

curl -X POST "https://api.modelstream.ai/v1/video/generations" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "happyhorse-1.1-t2v",
  "prompt": "A cinematic, extreme close-up video of a giant, ornate hourglass standing on a mahogany table. Inside, instead of sand, flowing liquid gold mixed with glowing sapphire dust falls through the narrow neck. As the liquid hits the bottom, it splashes in slow motion, creating crown-shaped ripples that freeze into intricate crystalline structures. The glass of the hourglass is etched with moving astrological symbols that glow with a soft white light. Outside the glass, wisps of thick, purple incense smoke curl and drift lazily around the frame. The lighting is warm and flickering, as if from a nearby fireplace, creating deep amber highlights and long, dancing shadows. 4k, 60fps, shallow depth of field with heavy bokeh, focus on the fluid dynamics of the falling gold and the texture of the carved wood.",
  "size": "1080P",
  "duration": 5,
  "metadata": {
    "parameters": {
      "ratio": "16:9",
      "watermark": true
    }
  }
}'

{
  "task_id": "abcd1234efgh",
  "status": "queued"
}