Acheron memory MCP server

Acheron is a small helper that gives your AI a memory. You tell it something worth keeping, like a decision or a preference, and it stores that on your own computer. Later, in a different chat or in Claude Code, you can ask for it back. It is handy if you keep repeating yourself to your AI.

What this MCP server does

You talk to your AI in plain words, like remember this or what did we decide about that. Your AI passes the request to Acheron. Acheron saves your note in a small database file on your computer, or searches that file for you. Then it hands the answer back to your AI, which tells you in the chat. Because the file lives on your machine, the same memory is available in Claude Chat, Claude Code and Cowork.

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What you can do with it

• Save a decision or preference so you do not have to repeat it
• Search your saved notes by keyword
• List everything you saved for one project
• Filter your notes by project, type or tag
• Open a saved note to see its full details
• Delete a note you no longer need
• Check how many notes you have stored

Try asking your AI

• “Remember: we are using Next.js App Router for the acme-site project.”
• “What did we decide about the authentication approach?”
• “Show me everything saved for acme-site.”
• “Find my notes on the database choice.”

What it gives back to you

You get your own words back, plus the details Acheron stored with them, like the project name, the type and any tags. A search returns a short list of matching notes, and you can ask for the full text of any one. Saving or deleting gives you a short confirmation. It all shows up as normal text in your chat.

Before you start

Who it's for

Anyone who uses Claude across more than one place and is tired of repeating the same context, especially people juggling several projects.