Hi! Right now Messenger API doesn’t allow to automate messages on Personal Profiles, this includes Marketplace. So, to be more clear on this, you can only automate messages on Business Facebook Pages.

You're not alone—Facebook Marketplace doesn't support bots natively, but that’s exactly why I built GetReplyNow. It’s a Chrome extension that automates replies to customer messages using AI, and it works directly on Facebook. No API access needed.