The curl command to convert a local file to svg:

curl -X POST
https://alessandrotesta.info:9091/servizi/immagini/convertifiletosvg
-H ‘Host: alessandrotesta.info:9091’
-H ‘X-RapidAPI-Proxy-Secret: YOUR-RAPIDAPI-KEY’
-H ‘content-type: multipart/form-data;’
-F numcolors=64
-F ratio=250
-F prop=50
-F ‘file=@PATH_FILE_TO_CONVERT’

The curl command to convert a URL image file to svg

curl -X POST
https://alessandrotesta.info:9091/servizi/immagini/convertiurltosvg
-H ‘Host: alessandrotesta.info:9091’
-H ‘X-RapidAPI-Proxy-Secret: YOUR-RAPIDAPI-KEY’
-F numcolors=64
-F ratio=100
-F prop=50
-F ‘url=https://nst.sky.it/content/dam/static/contentimages/original/sezioni/tg24/economia/2019/02/07/loghi/collage_loghi.png/jcr:content/renditions/cq5dam.web.738.462.png’