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POST
https://gptproto.com
/
api
/
v3
/
openai
/
sora-2
/
image-to-video
sora-2 (Image To Video)
curl --request POST \
  --url https://gptproto.com/api/v3/openai/sora-2/image-to-video

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Authentication

  1. Sign up for a GPTProto account at https://gptproto.com
  2. Navigate to the API Keys section in your dashboard
  3. Generate a new API key (sk-xxxxx)
  4. Copy and securely store your API key For authentication details, please refer to the Authentication section.

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Initiate Request

curl --location 'https://gptproto.com/api/v3/openai/sora-2/image-to-video' \
--header 'Authorization: GPTPROTO_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
  "prompt": "Put a hat on the cat",
  "image": "https://tos.gptproto.com/resource/cat.png",
  "duration": 4
}'

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Query Result

If the request that generated your content includes the parameter enable_sync_mode set to true (some models do not support this parameter, but you still need to query the result by id), you must call the Query Result endpoint to retrieve the final output. 
curl -X GET "https://gptproto.com/api/v3/predictions/{id}/result" \
  -H "Authorization: GPTPROTO_API_KEY" \
  -H "Content-Type: application/json"
After submitting your prediction request, the response will contain the id you need.
You can find it in either:
  • data.id – the unique identifier of the prediction
  • data.urls[0].get – a ready-to-use GET URL that already embeds the id
{
    "data": {
        "id": "abc",
        "model": "model_name",
        "outputs": [],
        "urls": {
            "get": "https://gptproto.com/api/v3/predictions/abc/result"
        },
        "status": "completed",
        "error": null,
        "executionTime": 0,
        "timings": {
            "inference": 0
        },
        "has_nsfw_contents": [],
        "created_at": "2026-01-01 00:00:00"
    },
    "message": "success",
    "code": 200
}

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Parameters

ParameterTypeRequiredDefaultRangeDescription
promptstring✅ Yes--Text prompt that describes the video to generate.
imagefile❌ No--Optional image reference that guides generation. The image must match the target video’s resolution (size).
durationstring❌ No44
8
12		Clip duration in seconds. Defaults to 4 seconds.
sizestring❌ No720x1280720x1280
1280x720
1024x1792
1792x1024		Output resolution formatted as width x height. Defaults to 720x1280. Note: 1024x1792 and 1792x1024 are only supported by sora2-pro model.

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Error Codes

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Common Error Codes

Error CodeError NameDescription
401UnauthorizedAPI key is missing or invalid
403ForbiddenYour API key doesn’t have permission to access this resource, or insufficient balance for the requested operation
429Too Many RequestsYou’ve exceeded your rate limit
500Internal server errorAn internal server error occurred
503Content policy violationContent blocked due to safety concerns (actual status code is 400)