Cairn

Verified Integration

Author: @establishing•Category: ServerApplication

GitHub Repository

JSON-RPC 2.0

Protocol Standard

Sub-second

Execution Latency

Active

Operational Status

Client Configuration

— Connect Cairn to Claude Desktop or Cursor in seconds

{
  "mcpServers": {
    "cairn-5": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-cairn-5"
      ],
      "env": {}
    }
  }
}

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Architecture & Capabilities

System Overview

Centralizes project progress for AI programming tools by establishing a shared, consistent memory across different agents and sessions.

Indexed Date

7/22/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Cairn

Cairn utilizes a human-readable `PROGRESS.md` file as a single source of truth for all project progress. AI agents can programmatically read and update this file via MCP server integration, enabling seamless continuity across tools and sessions.

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