curl --data-binary @{image} -H Content-Type:image/png https://molvec.ncats.io/{engine}
        
where {image} is the input image file and {engine} is one of the supported values: molvec, osra, imago, or all. Note that the value for Content-Type can be any supported image formats; it doesn't have to match the actual mime-type of the specified image.
Image preview...