Use the HappyHorse API via RunAPI with a model skill, unified auth, and pay-as-you-go pricing.
curl -X POST https://runapi.ai/api/v1/happyhorse/image_to_video \
-H "Authorization: Bearer $RUNAPI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "happyhorse-text-to-video",
"first_frame_image_url": "https://cdn.runapi.ai/public/samples/image.jpg",
"prompt": "Generate a 5-second 1080p cinematic clip of a paper horse galloping through a miniature cardboard city at night."
}'import { HappyhorseClient } from "@runapi.ai/happyhorse";
const client = new HappyhorseClient();
const result = await client.imageToVideo.run({
model: "happyhorse-text-to-video",
first_frame_image_url: "https://cdn.runapi.ai/public/samples/image.jpg",
prompt: "Generate a 5-second 1080p cinematic clip of a paper horse galloping through a miniature cardboard city at night.",
});<?php
require __DIR__ . "/vendor/autoload.php";
use RunApi\Happyhorse\HappyhorseClient;
$client = new HappyhorseClient();
$result = $client->imageToVideo->run([
'model' => 'happyhorse-text-to-video',
'first_frame_image_url' => 'https://cdn.runapi.ai/public/samples/image.jpg',
'prompt' => 'Generate a 5-second 1080p cinematic clip of a paper horse galloping through a miniature cardboard city at night.',
]);require "runapi/happyhorse"
client = RunApi::Happyhorse::Client.new
result = client.image_to_video.run(
model: "happyhorse-text-to-video",
first_frame_image_url: "https://cdn.runapi.ai/public/samples/image.jpg",
prompt: "Generate a 5-second 1080p cinematic clip of a paper horse galloping through a miniature cardboard city at night."
)npx skills add runapi-ai/happyhorse -g# Claude Code
claude mcp add runapi -s user -- npx -y @runapi.ai/mcp
# Codex
codex plugin install runapi-mcp@agents
# Cursor / Windsurf / VS Code
npx @runapi.ai/mcp init cursorHappyHorse creates text, image, and edit-video clips with selectable 720p or 1080p output, deterministic seed control, first-frame image guidance, ordered reference-image guidance for the character model, and source-video edit instructions.
| Variant | Billing | Pricing | |
|---|---|---|---|
| happyhorse-1.0-i2v | second | $0.24 | View → |
| happyhorse-1.0-r2v | second | $0.24 | View → |
| happyhorse-1.0-t2v | second | $0.24 | View → |
| happyhorse-character | second | $0.41 | View → |
| happyhorse-edit-video | second | $0.48 | View → |
| happyhorse-image-to-video | second | $0.41 | View → |
| happyhorse-text-to-video | second | $0.41 | View → |
| Endpoint | Resolution | Duration | Price | |
|---|---|---|---|---|
| image_to_video | 720p, 1080p | — | $0.14-$0.24 / second |
Prices shown for happyhorse-1.0-i2v. Other variants retain their own endpoint pricing.
Sign up and generate an API key from the dashboard.
Choose the version that best matches your quality and cost requirements.
Submit your prompt and parameters to the model's documented endpoint.
Poll the task or set a webhook, then download the completed output.
HappyHorse belongs to the Alibaba catalog on RunAPI and exposes canonical text-to-video, image-to-video, and edit-video capabilities across API, SDK, CLI, Bruno, and docs surfaces.
A single RunAPI API key unlocks the whole model catalog across all providers. No separate accounts to create, no API keys to rotate per integration, and no credential management overhead. Add a new model to your app by changing one parameter.
Per-call pricing in USD, billed monthly into a single invoice. No subscription tiers, no minimum spend, and failed generations are never charged. The pricing page and check_pricing API show exact costs before you commit to a model.
Typed schemas, parameter constraints, and setup notes are packaged in the model skill so your implementation starts from the right contract. The skill loads into Claude Code, Codex, Gemini CLI, Cursor, and VS Code — your agent knows the correct request shape before you write a line of code.
HappyHorse offers text-to-video from a prompt, character-guided text-to-video from a prompt plus ordered reference images, image-to-video from one first-frame image, and edit-video from one source clip.
All HappyHorse video endpoints support 720p and 1080p output. 1080p is the default, while 720p is useful for drafts and social clips.
HappyHorse video generation endpoints support integer durations from 3 to 15 seconds, while edit-video accepts a 3-60 second source video.
Image-to-video accepts exactly one public image URL and treats it as the first frame before generating motion from the prompt and settings.
The character model accepts 1-9 public image URLs on the text-to-video endpoint; their order maps to character1, character2, and later references in the prompt.
Edit-video accepts one public MP4 or MOV source video, an edit instruction, and up to 5 optional reference images.