MCP server · Notes
Chamber MCP server
by abm9111
Checks your AI's numbers and names against the note it cites, and warns you when a source changes.
Chamber is a small helper that catches your AI quoting a number or a name that is not actually in the note it says it came from. It is handy if you keep notes in markdown files and let an AI answer questions from them. It also keeps an eye on those notes and tells you when a note changed underneath a conclusion you already trusted.
What is an MCP server? The 30-second version
On its own, your AI can only chat with you. An MCP server is a small helper program that gives your AI a new skill or a connection to an app or service. This one connects your AI to a folder of notes on your own computer, so it can check a claim against the note it cites before telling you the claim. You add it once, and from then on your AI can use it whenever you ask about your notes.
What this MCP server does
You ask your AI a question about your notes. The AI writes an answer and says which note each sentence came from. Before showing it to you, the AI runs each claim through Chamber. Chamber opens the cited note on your disk and looks for the numbers, capitalised names, web addresses, file names and counts in the claim. If something is missing, you see a clear flag saying which term was not found, so you know the sentence does not match the note.
What you can do with it
- Check whether a number in an AI answer really appears in the note it cites
- Flag a name, web address or file name that is not in the cited note
- Show which note and which part of it was checked
- Warn you when a note changed after a conclusion was built on it
- Keep a quiet daily watch on your notes and only speak up when something drifted
- Run the same check on a shared folder of documents in a team workflow
Try asking your AI
- “Check these claims against my notes before you answer me”
- “Did the note really say the Q3 revenue was 420k?”
- “Which of these sentences are supported by the file they cite?”
- “Has anything in my notes changed since last week?”
What it gives back to you
For each claim you get a short verdict line in the chat, such as SUPPORTED or TERMS_ABSENT, plus the exact term that was missing and the note it checked. When a note has changed since it was last read, the result adds a note that the index is behind the file. The daily check stays quiet unless something drifted, and then it raises a notification with the file name.
Before you start
What you need
- Node.js 22 or newer (the published package needs Node 22; a checkout needs Node 23.6 or newer)
- A folder of notes in markdown files on your computer
- The Claude desktop app or another AI app that supports MCP servers
Good to know
It only checks whether the numbers and names appear in the cited note, not whether the sentence means the same thing, so a sentence built from the note's own words in a reversed or negated way can still pass.
Install it with your AI
Add Chamber MCP server to your AI, no technical skills needed
You don't install anything by hand. You copy one prompt, paste it into an AI that can work on your computer, and it checks, installs and connects the server for you, asking you when it needs something.
Sign in to get the install prompt
Members get a ready-made prompt that lets the Claude desktop app check Chamber MCP server, install it and connect it for them, step by step. You don't need any technical skills: you copy, paste and answer a few questions. Your connected AI can also find and install any of the 4,609 MCP servers here for you.
Who it's for
People who keep notes, research or policy documents in markdown files and want their AI to stay honest about what those notes actually say.
