Yeah, thanks for linking to the issue. I'm one of the upvotes on that. However, the age of that issue suggests to me that current contributors are (or have historically been) uninterested in a REST API.
Still, would be great to see such an update, and I'm still using ArchiveBox either way.
It's not so much that the team isn't interested in building it, more that there there were some volunteers that indicated they started work on APIs already so I moved on to work on other areas of the codebase. Those draft PRs have since been closed as stale... so I'm planning to come back to doing the API myself in the next major version cycle.
Still, would be great to see such an update, and I'm still using ArchiveBox either way.
(Just read your bio, thanks for creating this)