Happy Horse 1.1 Ref-to-Video

Happy Horse · Video · Image → Video

Generate video from up to 9 reference images — refer to them in the prompt as `[Image 1]`, `[Image 2]`, … in the same order they appear in the input list.

Model ID: happyhorse-1.1-r2vWorkflow: happyhorse/v1.1/reference-to-video

Multi-Image Input1080P3-15 sec

Try on Playground ↗

SDK API Advanced Usage Pricing

Authentication

Send your Picsart API key as a bearer token on every request.

Header

Authorization: Bearer <PICSART_API_KEY>

Make a request

One endpoint serves every model: POST to /workflows/v1/models/execute with the model id and its input in the body. The nesting is deliberate — the outer paramsis the envelope every workflow takes, and the inner one is this model's own input. Those inner names are the same unified ones the SDK takes, so a call translates one-to-one between the two — no per-vendor naming to learn.

cURL

curl -X POST 'https://api.green-salad-4efd.toolsminati.workers.dev/workflows/v1/models/execute' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "model": "happyhorse-1.1-r2v",
    "params": {
      "prompt": "A serene mountain lake at golden hour, ultra detailed",
      "aspectRatio": "16:9",
      "resolution": "720P",
      "duration": 5,
      "imageUrls": [
        "https://cdn.example.com/input.jpg"
      ]
    }
  }
}'

Async (submit & poll)

This model can run longer than the sync limit (~20s), so send it to /workflows/v1/models/submit, which returns a task id, and poll /workflows/v1/models/{taskId}/result until response.status is COMPLETED or FAILED.

cURL

# 1. Submit the job
curl -X POST 'https://api.green-salad-4efd.toolsminati.workers.dev/workflows/v1/models/submit' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "model": "happyhorse-1.1-r2v",
    "params": {
      "prompt": "A serene mountain lake at golden hour, ultra detailed",
      "aspectRatio": "16:9",
      "resolution": "720P",
      "duration": 5,
      "imageUrls": [
        "https://cdn.example.com/input.jpg"
      ]
    }
  }
}'
# → { "status": "success", "response": { "id": "task_abc123" } }

# 2. Poll until response.status is COMPLETED
curl 'https://api.green-salad-4efd.toolsminati.workers.dev/workflows/v1/models/task_abc123/result' \
  -H 'Authorization: Bearer $PICSART_API_KEY'

Result body

{
  "status": "success",
  "response": {
    "id": "task_abc123",
    "status": "COMPLETED",
    "result": {
      "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result",
      "items": [
        {
          "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result"
        }
      ],
      "model": "happyhorse-1.1-r2v"
    },
    "usage": {
      "credits": 5
    }
  }
}

Parameters

6 parameters, sent inside the inner paramsobject. Identical to the SDK's — one parameter set, whichever transport you use.

Parameter	Type	Required	Default	Details
`prompt` Prompt	`text`	yes	`—`	max 2500 chars
`seed` Seed	`range`	no	`—`	0–2147483647 (step 1)
`aspectRatio`	`enum`	no	`16:9`	16:9, 9:16, 1:1, 4:3, 3:4
`resolution`	`enum`	no	`720P`	720P, 1080P
`duration`	`range`	no	`5`	3–15 (step 1)
`imageUrls` Reference Images	`file (image[])`	yes	`—`	—

Response

The body arrives in the gateway's status envelope, so the output is at response.result — alongside the task id, its status and the credits charged. Asset models return url plus an items array; text models return text instead.

Response body

{
  "status": "success",
  "response": {
    "id": "task_abc123",
    "status": "COMPLETED",
    "result": {
      "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result",
      "items": [
        {
          "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result"
        }
      ],
      "model": "happyhorse-1.1-r2v"
    },
    "usage": {
      "credits": 5
    }
  }
}