teampolarity/cosmos-mcp

Overview

MCP server and local sync package for Cosmos. Connects agents, iMessage, browser history, calendar, Claude Desktop, and shell history to a shared personal graph. Runs locally as a TypeScript package.

Best for

Best for
Developers building a unified personal knowledge graph from local data sources.

Use cases

• Sync iMessage and browser history into a personal graph
• Expose calendar and shell history to MCP-compatible agents
• Connect Claude Desktop to a shared local data graph

How to use

Install

npx -y @polarity-lab/cosmos-mcp install-handler

Tools exposed

• polarity_whoami
• polarity_export
• polarity_get_graph
• polarity_ask
• polarity_observe
• polarity_record_event
• polarity_record_preference
• polarity_capture_turn
• polarity_reconstruct_hours
• polarity_dump
• polarity_checkin
• polarity_declare
• COSMOS_URL
• COSMOS_TOKEN
• COSMOS_MCP_KEY
• COSMOS_USER_ID
• COSMOS_SYSTEM_KEY

Tested with

Claude Desktop, Claude Code, Cursor, Continue, ChatGPT

Notes

MCP server and local sync package for Cosmos. Connects agents, iMessage, browser history, calendar, Claude Desktop, and shell history to a shared personal graph. Runs locally as a TypeScript package.

3 stars on GitHub. Last updated 2026-08-25. Licensed MIT.

Use cases

• Sync iMessage and browser history into a personal graph
• Expose calendar and shell history to MCP-compatible agents
• Connect Claude Desktop to a shared local data graph

Pros

• Broad source integration in one package
• Local sync keeps data on-device
• TypeScript codebase for easy customization

Cons

• Low community traction (3 stars)
• Vendor listed as Various, unclear maintenance status
• Requires Cosmos setup to use effectively

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.