You can use curl with this API to manipulate an image from the command line.

Here’s an example which will read image.png from the local file system, upload it, and apply the -resize 300 commnd. This will return an image that has been resized to a maximum of 300 pixels.

curl -s -X POST -H "Content-Type: multipart/form-data" -H "X-RapidAPI-Key: ${RAPIDAPI_KEY}"\
    -F "image=@image.png" -F "args=-resize 300" https://magic-image.p.rapidapi.com/convert-cli/output.jpg -o output.jpg

You’ll need to set the environment variable RAPIDAPI_KEY first:

export RAPIDAPI_KEY="...your key value..."