Memory Arbiter MCP server

Memory Arbiter is a small helper that runs on your own computer and keeps a shared notebook of facts for your AI assistants. Instead of each AI forgetting everything between chats, they all read and write to the same local store. It is handy if you use coding agents or chat assistants and want them to remember the same things without mixing up old and new information.

What this MCP server does

You tell your AI something worth keeping, like a project detail or a preference, and the AI uses this helper to save it in a local database on your computer. Later, when you ask a question, the AI searches that store and pulls back only the parts that match, instead of loading everything. If two saved facts seem to contradict each other, the helper flags it so you can decide which one is right. You can also look up the full history of a fact, see where it came from, and lock important ones so they are not changed by accident. All of this happens locally, and no outside service is needed.

Click to zoom

What you can do with it

• Save a fact or preference so your AI remembers it next time
• Search your saved facts by keyword or meaning
• Look up the exact original text of a saved fact
• Update a fact when a newer source replaces it
• See the full history of changes to any saved fact
• Get a warning when two saved facts seem to disagree
• Lock important facts so they cannot be silently changed

Try asking your AI

• “Remember that our main database is SQLite, not MySQL.”
• “What did I tell you about the deployment schedule?”
• “Show me the full history of the fact about our API rate limit.”
• “Are there any saved facts that seem to contradict each other?”

What it gives back to you

You get back lists of matching facts with short previews, plus the exact original text when you ask for it. Each result can show where it came from, when it was saved, and how long the full text is. If two facts clash, you get a notice explaining the disagreement so you can choose. When you update or lock something, the change is confirmed in the chat and recorded in the history.

Before you start

Who it's for

Developers and technical office workers who use several AI coding agents and want them to share one trustworthy set of facts without sending data to the cloud.