Cosmos MCP

A community MCP server and local sync package that connects various AI agents and personal data sources (iMessage, browser history, calendar, shell history) to a shared personal knowledge graph. It allows any MCP-capable client to read and write to the same graph, ensuring the user owns the integration layer and data portability across tools like Claude Desktop, Cursor, and Zed.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by teampolarity

You need:Sign in at cosmos.polarity-lab.com/connectorsFull Disk Access is granted

Vendor documentation

What you can do with it

Connect AI agents to a shared personal knowledge graph
Sync iMessage, browser history, and calendar data
Enable cross-agent data persistence for Claude Desktop and Cursor

Source and maintenance

Community listingRegistry 0.7.1

mcp-registry: io.github.teampolarity/cosmos-mcp@0.7.1 Source repository

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@polarity-lab/cosmos-mcp 0.7.1

npm

@polarity-lab/cosmos-mcp package definition

{
  "version": "0.7.1",
  "transport": "stdio",
  "identifier": "@polarity-lab/cosmos-mcp",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "COSMOS_TOKEN",
      "format": "string",
      "description": "pmk_ key from https://cosmos.polarity-lab.com/connectors. Optional on macOS once the system keychain is provisioned via `npx -y @polarity-lab/cosmos-mcp provision pmk_...`."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "cosmos-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@polarity-lab/cosmos-mcp@0.7.1"
      ],
      "env": {
        "COSMOS_TOKEN": "<YOUR_COSMOS_TOKEN>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "cosmos-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@polarity-lab/cosmos-mcp@0.7.1"
      ],
      "env": {
        "COSMOS_TOKEN": "<YOUR_COSMOS_TOKEN>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "cosmos-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@polarity-lab/cosmos-mcp@0.7.1"
      ],
      "env": {
        "COSMOS_TOKEN": "<YOUR_COSMOS_TOKEN>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "cosmos-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@polarity-lab/cosmos-mcp@0.7.1"
      ],
      "env": {
        "COSMOS_TOKEN": "<YOUR_COSMOS_TOKEN>"
      }
    }
  }
}

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