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HappyHorse 1.5 API

Build powerful AI video generation into your applications. Access ByteDance's state-of-the-art video models via simple REST APIs. Create cinematic videos from text prompts or images with multi-shot coherence, native sound synthesis, and character consistency.

Seedance 2.0 · 14 credits/sec

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Join Discord and DM an admin with "Get free API credits" + your email to receive free trial credits; or email [email protected] instead.

API Endpoints

Simple RESTful APIs for video generation

Quick Start with AI Tools

Use AI assistants like Claude Code, Cursor, or Codex to integrate the API in minutes.

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Go to Settings > API Keys and create a new API key

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Download the complete API docs as Markdown file

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POST /api/v1/jobs/createTaskMost Popular

Generate videos from text prompts. Describe your scene and let AI create stunning video content.

Request

cURL

curl -X POST "https://happyhorse15.com/api/v1/jobs/createTask" \
  -H "Authorization: Bearer sk_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "official-kling-v3-0",
    "inputs": {
      "prompt": "A majestic dragon flying over snowy mountains",
      "duration": "5s",
      "aspectRatio": "16:9",
      "resolution": "720p"
    }
  }'

Response

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "abc123xyz"
  }
}

Parameters Reference

Request Parameters

model - Model ID (use "seedance-2-0")
inputs.prompt - Text description of the video (required for text-to-video, optional for image-to-video)
inputs.duration - Video length: 4s, 5s, 8s, 10s, or 15s
inputs.aspectRatio - Aspect ratio: 16:9, 9:16, 1:1, 4:3, 3:4, 21:9
inputs.resolution - 480p, 720p, 1080p
inputs.urls - Array of 1-2 image URLs for image-to-video

Resolution Options

480p - official resolution label
720p - official resolution label
1080p - official resolution label
Actual output width and height depend on the selected aspectRatio.

HTTP Status Codes

Success

200Request successful

Errors

400Invalid parameters or missing required fields

401Authentication failed (invalid or missing API key)

402Insufficient credits

403Permission denied (accessing other user's resources)

404Task not found

451Content violates policy (inappropriate content detected)

500Internal server error

Error Codes

When status is 'fail', the response includes an errorCode field for programmatic handling:

CONTENT_POLICYContent violates platform policy. Please modify your prompt or image and try again.

GENERATION_FAILEDVideo generation failed due to technical reasons. Please retry.

INVALID_PARAMSInvalid request parameters. Please check the API documentation.

Pricing

HappyHorse 1.5 で作成を始める

HappyHorse 1.5 はプロンプト、参照画像、音声指示から一貫した短尺AI動画を作るワークスペースです。広告、SNS、解説、絵コンテ検証に使えます。

Starter

$20$16/mo

💰 Pay yearly only$240$192

Save $4820% OFF

Perfect for getting started with HappyHorse 1.5

Cost per 100 credits$1.78

900 credits/month
Download videos in MP4 format
Access to all templates
Keep your videos forever
Email support within 24h
Community access
HappyHorse 1.5 Fast & Pro mode support
Additional AI models
Access to AI image generation models (Flux, Seedream, etc.)

Priority support
Advanced features

Popular

Pro

$59.92$29.95/mo

🔥 50% OFF Launch Sale

💰 Pay yearly only$719$359.5

Save $359.5

Scale

$299$149.5/mo

🔥 50% OFF Launch Sale

💰 Pay yearly only$3,588$1,794

Save $1,794

For power users creating videos with HappyHorse 1.5

Cost per 100 credits$0.84

17900 credits/month
Download videos in MP4 format
Access to advanced AI image generation models (Flux 2 Pro, Seedream 5.0, etc.)
Access to all templates
Priority customer support
Fastest generation queue
Dedicated account manager
Keep your videos forever
All advanced video features
Priority video processing
Access to all HappyHorse 1.5 modes
All premium video features
Full HappyHorse 1.5 access

Need help?Join our Discord

HappyHorse 1.5 の長期利用権

支払い後、プランと適用条件に従って HappyHorse 1.5 で生成した対象作品を利用できます。

PERMANENT

HappyHorse 1.5 商用利用ライセンス

有料ユーザーは対象の HappyHorse 1.5 AI動画作品の商用利用証明をダウンロードできます。

PRO ESSENTIAL

?注文でお困りですか？

返金 / 注文の問い合わせ

通常24時間以内に返信します

Have feedback on our video generation plans? Submit feedback or email us at [email protected]

FAQs

Frequently Asked Questions

Everything you need to know about the HappyHorse 1.5 API

When did the API launch?

The HappyHorse 1.5 API launched on February 20, 2026. Join our Discord for updates and support.

What video models are available?

The API provides ByteDance HappyHorse 1.5 with text-to-video and image-to-video, multiple resolutions and durations (4s–15s).

How is API usage billed?

Credits are deducted per second of generated video. HappyHorse 1.5 is 22 credits/sec (e.g. 5s = 110 credits, 10s = 220). See the pricing page for details.

What's the maximum video length?

Up to 15 seconds per request. Supported durations are 4s, 5s, 8s, 10s, and 15s.

Is there a free tier?

Yes. New users get a free allowance. For more free credits, join our Discord or email the admin.

What resolutions are supported?

Multiple aspect ratios (16:9, 9:16, 1:1, 4:3, 3:4) and common resolutions for landscape, portrait, or square.

Can't find the answer you're looking for? Our support team is here to help.

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