happyhorse-1.1-t2v API Usage Guide
Overview
happyhorse-1.1-t2v generates videos from text prompts with significantly improved motion expressiveness, multi-shot scene scheduling, and native audio synchronization over HappyHorse 1.0. Requests are submitted to the request-queue API and results are retrieved via polling.Authentication
Submit Video Generation Request
Base URL
Endpoint
Request Format
Request Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
| prompt | string | Yes | Text prompt (max 1500 chars) |
| negative_prompt | string | No | What to avoid in the video |
| resolution | enum | No | 720P or 1080P (affects pricing) |
| duration | int | No | 3–15 seconds (affects pricing) |
| prompt_extend | boolean | No | Enable LLM prompt rewriting |
| audio | boolean | No | Enable native audio generation |
| watermark | boolean | No | Add AI Generated watermark |
| seed | int | No | Reproducibility seed [0, 2147483647] |