Looking for embeddable music XML editor

Hi,
I'm looking to embed a visual (WYSIWYG) music XL editor in a web page so that my music students can practice online with exercises that I'll assign to them.
Would anyone have suggestions? Open source and free would be ideal of course!
It doesn't seem that Musescore does this, but I may be mistaken.

Many thanks to the community for your help, really appreciate it.