Learn how to use HappyHorse 1.0 · Video Edit.
Developer API pricing
Provider: SeeAPI
USD estimate: $0.0037 / credit · Estimated equivalent, not an additional charge.
720p: 34 credits/sec (≈ $0.13/sec)
1080p: 58 credits/sec (≈ $0.22/sec)
After submitting a task, use the unified query endpoint to check progress and retrieve results:
Manage the secret used to verify generation webhook signatures. Callback URLs are supplied when you create each generation.
Callback URL per generation.
/v1/generationsA unique key for this generation request. Reuse the same value only when retrying the identical request body.
order-20260818-001The public model ID documented on this page. Use happyhorse for this Endpoint.
happyhorsehappyhorsehappyhorseThe public Endpoint ID for the selected model. Use the Endpoint whose input schema matches this request.
video-editvideo-editvideo-editOptional public Provider ID. Omit this field to use the Endpoint's default Provider.
seeapiseeapiseeapiProvider-specific input object. Its accepted fields and validation rules depend on the selected provider.
Provider parameters
seeapiDefault ProviderDescribe the desired edit. The upstream service accepts up to 5,000 non-Chinese characters or 2,500 Chinese characters and truncates content beyond that limit.
A cinematic city at nightThe source video to edit according to the prompt.
https://client.example.com/input.mp4Optionally provide up to 5 JPEG, PNG, or WebP images. Each file must be no larger than 10 MB, both width and height must be at least 300 px, and the aspect ratio must be between 1:2.5 and 2.5:1.
Select 720p or 1080p output resolution. Higher resolution may use more credits.
720p1080p720pUse auto to let the model decide whether to regenerate audio, or origin to keep the input video's original audio.
autooriginautoOptional integer from 0 to 2147483647. Reusing the same seed can help make comparable requests more reproducible.
Optional absolute HTTPS URL that receives terminal generation updates. If omitted, query the task-details endpoint with the returned generation ID.
https://client.example.com/webhooks/seeapitask_xxxhappyhorsevideo-editseeapiseeapi: SeeAPIseeapiprocessingprocessingEstimated public credits. Values can include up to three decimal places.
34Consumed public credits, with up to three decimal places.
0Refunded public credits, with up to three decimal places.
02026-08-18T10:00:00Z2026-08-18T10:00:00ZWhether this response is an idempotent replay of an earlier request.
falsetask_xxxhappyhorsevideo-editseeapiseeapi: SeeAPIseeapiprocessingprocessingEstimated public credits. Values can include up to three decimal places.
34Consumed public credits, with up to three decimal places.
0Refunded public credits, with up to three decimal places.
02026-08-18T10:00:00Z2026-08-18T10:00:00ZWhether this response is an idempotent replay of an earlier request.
falseInvalid JSON, parameters, Schema, or API Policy
Invalid API Key or authentication failed
Insufficient credits
The current request is not allowed
Model, Endpoint, or task not found
Idempotency conflict or the same request is still being created
Request body is too large
Too many requests
Service temporarily unavailable
const response = await fetch("https://api.seeapi.com/v1/generations", {
method: "POST",
headers: {
"Authorization": "Bearer YOUR_API_KEY",
"Idempotency-Key": "order-20260818-001",
"Content-Type": "application/json"
},
body: JSON.stringify({
"model": "happyhorse",
"endpoint": "video-edit",
"provider": "seeapi",
"input": {
"prompt": "A cinematic city at night",
"input_video": "https://client.example.com/input.mp4",
"resolution": "720p",
"audio_setting": "auto"
},
"callback_url": "https://client.example.com/webhooks/seeapi"
})
});
const result = await response.json();{
"generation": {
"id": "task_xxx",
"model": "happyhorse",
"endpoint": "video-edit",
"provider": "seeapi",
"status": "processing",
"estimated_credits": 34,
"consumed_credits": 0,
"refunded_credits": 0,
"created_at": "2026-08-18T10:00:00Z",
"updated_at": "2026-08-18T10:00:00Z"
},
"idempotent": false
}