Key Capabilities
- Text-to-video — Generate video from text description alone
- Resolution — 720P / 1080P
- Aspect ratio — 16:9, 9:16, 1:1, 4:3, 3:4
- Duration — 3–15 seconds
- Watermark control — Optionally disable the “Happy Horse” watermark in the bottom-right corner
Workflow
Quick Example
Parameters
Optional parameters can be placed at the request top level or inside theparameters object — both are equivalent.
Billing
Billed by resolution tier × user-requested duration. The pre-charged amount is the final amount:duration: 5→ charged for 5 seconds (even if the upstream actually generates 6 seconds, billed at 5)- Failed tasks are automatically refunded
API Reference
HappyHorse 1.0 T2V interactive Playground.
Task Query
Poll task status and retrieve the final video URL.