Callosium

local MCP server

Installation

Terminal

claude mcp add callosium -e CALLOSIUM_MODEL_DIR=... -- npx -y callosium

Run in your project folder. Add --scope user to use it everywhere.

Claude Desktop, Cursor & other clients

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "callosium": {
      "command": "npx",
      "args": [
        "-y",
        "callosium"
      ],
      "env": {
        "CALLOSIUM_MODEL_DIR": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

Summary

One shared memory for every AI you use, in plain Markdown files you own.

Questions

Callosium is a local MCP server distributed as the npm package callosium.

Run: claude mcp add callosium -e CALLOSIUM_MODEL_DIR=... -- npx -y callosium

Run: codex mcp add callosium --env CALLOSIUM_MODEL_DIR=... -- npx -y callosium

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