LocalFree server, account needed

Cosmos MCP server

teampolarity/cosmos-mcp

Portable personal knowledge graph shared across AI clients, with sources like iMessage, browser history, calendar, shell history, Notion and Obsidian.

3 GitHub stars
Source code

Install Cosmos in Claude Code

Claude Code
claude mcp add cosmos -- npx -y @polarity-lab/cosmos-mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "cosmos": {
      "command": "npx",
      "args": [
        "-y",
        "@polarity-lab/cosmos-mcp"
      ]
    }
  }
}

Frequently asked questions

What does the Cosmos MCP server do?

Portable personal knowledge graph shared across AI clients, with sources like iMessage, browser history, calendar, shell history, Notion and Obsidian.

Is the Cosmos MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Cosmos run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Cosmos to Claude Code?

Run: claude mcp add cosmos -- npx -y @polarity-lab/cosmos-mcp

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