Prismic API - Any way for my users to submit a blog article?

Hey, welcome to the Community forum!

This would require a write API and unfortunately this is not a built in feature in Prismic. We've broadly talked about this in the past, Renaud gave a very thorough response about this, please take a look at his response, here:

If you have any feedback or comments that you want to share with us don't hesitate to also post them here.

Let me know if I can help you with anything else