happyhorse-1.1-t2v API

Use the exact happyhorse-1.1-t2v model ID through Modelflare asynchronous video routing.

Use the exact model ID happyhorse-1.1-t2v. The model field must match this page exactly.

Authentication and endpoint

Use a Modelflare API key with https://modelflare.dev/v1. The gateway entry point is POST /v1/videos.

Authorization: Bearer YOUR_MODELFLARE_API_KEY

Create a task

curl https://modelflare.dev/v1/videos \
  -H "Authorization: Bearer YOUR_MODELFLARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "happyhorse-1.1-t2v",
    "input": {"prompt": "A white cat runs through a neon-lit street in the rain, cinematic tracking shot"},
    "parameters": {"resolution": "1080P", "duration": 5, "watermark": false}
  }'

Poll and download

Save the task ID. Poll GET /v1/videos/{task_id} and download with GET /v1/videos/{task_id}/content. Result URLs may expire, so transfer the file promptly.

curl https://modelflare.dev/v1/videos/TASK_ID \
  -H "Authorization: Bearer YOUR_MODELFLARE_API_KEY"

Request notes

HappyHorse uses input.prompt; choose the input.media shape that matches the t2v, i2v, or r2v model ID.

Request parameters

HappyHorse T2V uses input.prompt to generate a video.

Field	Required	Notes
model	Yes	happyhorse-1.1-t2v
input.prompt	Yes	Text description or reference instructions
input.media[]	No	—
parameters.resolution	No	720P / 1080P
parameters.ratio	No	16:9 / 9:16 / 1:1 / 4:3 / 3:4 / 4:5 / 5:4 / 9:21 / 21:9
parameters.duration	No	3–15 seconds; use the official default
parameters.watermark	No	Whether to add the HappyHorse watermark
parameters.seed	No	Optional random seed

Input and output limits

T2V needs only input.prompt; output is 720P or 1080P for 3–15 seconds.

Supported scope

This page covers Modelflare model generation and editing calls. Search or map enrichment, voice management, and element-library management are resource APIs outside this public model-call surface and are not required request fields.

Pricing and billing

This model uses per-second video billing. See the model pricing page for the current customer price, reference list price, and complete specification.

This page documents Modelflare’s public interface; the fields and limits shown here are the current contract.