1 model · video
Happy Horse API
Happy Horse is an AI video model made by Alibaba. varg runs it on one API key. It covers text to video, image to video and video to video; it returns video.
- Price
- From $0.42 per run
- Made by
- Alibaba
- Flagship id
happy_horse
Happy Horse runs on one varg API key and one credit balance, the same as every other model here. You pay the provider's price, with no markup.
curl -X POST https://api.varg.ai/v2/tools/video/call \
-H "Authorization: Bearer $VARG_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "happy_horse",
"prompt": "a cute cat playing with a ball of yarn in a sunny garden, cinematic",
"aspect_ratio": "16:9",
"duration": 5
}'Happy Horse models and prices
Happy Horse on varg starts from $0.42 per run (Happy Horse). Prices are in US dollars and are the provider's own, with no markup. A "from" price is the cheapest request the catalog states for that model; each model's page has every rate and input. The descriptions are the catalog's own, shortened.
| Model | Catalog description | Takes | Price | Typical time |
|---|---|---|---|---|
Happy Horsehappy_ | Alibaba video generation. Expressive character motion. | Text to video, Image to video, Video to video | From $0.42 per runfrom $0.14/s | ~3 min |
Call the Happy Horse API
The call below runs Happy Horse.
REST
POST https://api.varg.ai/v2/tools/video/call with Authorization: Bearer $VARG_API_KEY. It answers 202 with a job right away; poll GET /v2/jobs/{id} until its status is completed, then read output.outputs[0].url.
curl -X POST https://api.varg.ai/v2/tools/video/call \
-H "Authorization: Bearer $VARG_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "happy_horse",
"prompt": "a cute cat playing with a ball of yarn in a sunny garden, cinematic",
"aspect_ratio": "16:9",
"duration": 5
}'From Claude, ChatGPT or Cursor (MCP)
The varg MCP server, https://mcp.varg.ai/mcp, runs Happy Horse with call_tool. Sign in with varg, no API key to paste. How to connect it
claude mcp add --transport http varg https://mcp.varg.ai/mcp{
"tool": "video",
"input": {
"model": "happy_horse",
"prompt": "a cute cat playing with a ball of yarn in a sunny garden, cinematic",
"aspect_ratio": "16:9",
"duration": 5
},
"wait": true
}From a terminal (CLI)
vargai is the varg command line: every tool of the MCP server is a command. Install and log in
curl -fsSL https://varg.ai/install | sh
vargai call_tool --tool video '{"model":"happy_horse","prompt":"a cute cat playing with a ball of yarn in a sunny garden, cinematic","aspect_ratio":"16:9","duration":5}'How billing works
Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01. varg's fee is on the top-up, not on the run: 5.5% of the credits you buy ($0.80 at the least), or 8% for a team workspace. Pricing
How to use Happy Horse
Step-by-step pages on varg how to.
Happy Horse API: questions
- How much does the Happy Horse API cost on varg?
- Happy Horse costs from $0.42 per run on varg (from $0.14/s on the cheapest route). Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01. For the exact price of a request before you run it, send the same body to POST https://api.varg.ai/v2/estimate.
- Does Happy Horse take an image?
- Yes: the catalog lists image to video for Happy Horse. Pass the image as a URL in "files".
- How long are the clips Happy Horse makes?
- 3 to 15 s per request, by its input schema.
- How long do Happy Horse requests take?
- Typically about 3 min, by the catalog's estimate for its fastest route. The API answers at once with a job id, so nothing waits on an open connection while it runs.
- How do I call the Happy Horse API?
- Send POST https://api.varg.ai/v2/tools/video/call with the header "Authorization: Bearer $VARG_API_KEY" and a JSON body that includes "model", for example "model": "happy_horse". The call answers 202 with a job right away. Poll GET https://api.varg.ai/v2/jobs/{id} until "status" is "completed", then read output.outputs[0].url, or pass options.webhook_url to be called back.
- Can I use Happy Horse from Claude, ChatGPT or Cursor?
- Yes. Add the varg MCP server (https://mcp.varg.ai/mcp) to Claude, ChatGPT, Cursor or any other MCP client and sign in with varg, with no API key to paste. The agent runs a model with call_tool, passing tool "video" and the model id, for example "model": "happy_horse".
More model APIs
Same API key, same request shape: change the model string to switch.
For AI agents: each model above has its full spec as Markdown at varg.ai/models/happy_horse.md (swap the id), and every model is listed in varg.ai/models/llms.txt.