Can I publish an article as a sole author if my supervisor agrees? I'm currently working in a project that is funded by me and the supervisor doesn't contribute much to my work (he is just directing me slightly if I asked him) and he told me that he doesn't need to publish and I can publish as a sole author if I want. I only have a Master degree, can I publish as a sole author? can some journals accept that? Should I contact a journal to ask? if the journal agrees, so this is will be fine? (By the way my field is Biochemistry)
Everyone can submit articles to journals, there is no degree requirement.
There is nothing negative about single author manuscripts.

Manuscripts should (ideally) be evaluated by its content not by its author list.