Run your own private notes platform that you and Claude can both reach — from a browser, from your phone, and locally on your computer. Every note is a plain markdown file you own, with no import, no export, and no lock-in with Apple or Notion or Google. Going from nothing to a working setup takes about twenty minutes.
The problem: local markdown and CSVs provide the most efficient way to collaborate with an agent, for planning code, writing, and crunching data. But these aren't easily accessible via mobile on the go, like Notion. Notion, however, requires everything on a server, greatly limiting fast, local, programmatic work. A notes app called SilverBullet.plus solves part of the problem, providing local-server sync, unblocking local agent access. With this, the only gap was remote agent access, solved by this MCP.
The space can be edited from four places at once. Writes are collision-safe: a lastModified handshake rejects any overwrite whose base has shifted underneath it, so an agent can't blind-write over an edit it never saw. Deletes are soft, and errors come back structured and model-visible, each carrying a remediation hint.
Under the hood it's a small Node service that exposes any hosted SilverBullet space to Claude over HTTP, with OAuth 2.1 built in, so it works against managed hosts where you can't drop in a sidecar container. The cost is pennies a month and it scales to zero when idle.