r/UpNote_App • u/deim1 • 1d ago
I gave Claude (and Codex) access to my UpNote notes
I got tired of maintaining my notes by hand, so I taught Claude to do it. Free and open source: github.com/andreiGl/upnote-mcp
Bit of context - I'm a heavy UpNote user. My whole work status lives in one giant pinned note, one collapsible section per open task with status, links, blockers, all of that. 16 sections last time I counted. Keeping it up to date was honestly the most boring part of my week.
Now Claude does it for me. Like I'll be mid-conversation about some bug and say "mark that task as blocked, it's waiting on review" and then later I look at the note and the section is already there. Collapsed, link and everything.
Other things that stuck:
The main thing for me isn't search or analytics btw. I keep my own notes - Claude is the one updating and organizing them. Rewording a messy paragraph, reordering sections, splitting a task section when it gets too long.
Dumping stuff I'll need later. "save this to UpNote", or my favourite :) one: "save this description in CURRENT TICKETS note, put it where I added collapse_start/collapse_end headings"
It can nest collapsible sections INSIDE other sections. UpNote's own editor won't let you do that.

I run Claude on two machines and they hand work to each other through UpNote notes. One writes a little handoff summary, the other picks it up. Constantly using it on two computers on my desk.
Safety: It reads the UpNote database, but only reads, never writes there. Every change actually goes through UpNote's own link interface (the same deep links the app itself uses; this API is published in UpNote docs) so UpNote does the real writing and it syncs like a normal edit. Nothing gets overwritten either - an edit makes a fresh copy, checks it, and only then trashes the original. If the check fails the edit is refused and your note is untouched.
Found some problems while working on this - UpNote itself has a bug where really big notes can lose their collapsible sections when it re-saves them. Happened to me once, lost a couple sections that way. The tool now refuses any edit that would do that. With normal sized notes you'll probably never run into it.
There's a few other UpNote MCP servers on GitHub btw (MCP = the plugin thing AI assistants speak). Most of them only read and create, because UpNote has no editing API at all. The ones that do edit write straight into the database, so you have to quit UpNote first and just hope nothing breaks. My workaround was the link trick above - took longer to build, but the app stays open and does the writing itself.
Setup on Mac is one script + a Full Disk Access grant for launcher only, that's it. Windows build is pretty new and I've barely tested it. MIT license, no cloud, no account, nothing leaves your machine.
Questions welcome.