id
in the response to poll for results at the upscale/result/{id} endpointcurl --location --request POST 'https://api.stability.ai/v2alpha/generation/stable-image/upscale' \
--header 'authorization;' \
--form 'image=@"./some/image.png"' \
--form 'prompt=""'
{
"id": "a6dc6c6e20acda010fe14d71f180658f2896ed9b4ec25aa99a6ff06c796987c4"
}