Use paclet manager to install the latest version:
ResourceFunction["GitHubInstall"]["GalAster", "Mathpix"]Apply for your API Key from https://dashboard.mathpix.com/signup, with one thousand free credits per month
Then set your key and load the function:
PersistentValue["Mathpix", "Local"]={"$KeyName","$KeyValue"};Mathpix receives a Image, or the String of path to the image, or MathpixAPI object.
And have the following modes: {N, D, E, Text, "Raw"}.



