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Cairn

io.github.jasondostal/cairn-mcp ยท v0.21.2

Persistent memory for AI agents and humans. Store, search, and discover patterns.

Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add cairn-mcp -e CAIRN_DB_HOST=<CAIRN_DB_HOST> -e CAIRN_DB_PASS=<CAIRN_DB_PASS> -e CAIRN_TRANSPORT=<CAIRN_TRANSPORT> -e CAIRN_LLM_BACKEND=<CAIRN_LLM_BACKEND> -- docker run -i --rm ghcr.io/jasondostal/cairn-mcp:0.21.2
claude_desktop_config.json
{
  "mcpServers": {
    "cairn-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/jasondostal/cairn-mcp:0.21.2"
      ],
      "env": {
        "CAIRN_DB_HOST": "<CAIRN_DB_HOST>",
        "CAIRN_DB_PASS": "<CAIRN_DB_PASS>",
        "CAIRN_TRANSPORT": "<CAIRN_TRANSPORT>",
        "CAIRN_LLM_BACKEND": "<CAIRN_LLM_BACKEND>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "cairn-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/jasondostal/cairn-mcp:0.21.2"
      ],
      "env": {
        "CAIRN_DB_HOST": "<CAIRN_DB_HOST>",
        "CAIRN_DB_PASS": "<CAIRN_DB_PASS>",
        "CAIRN_TRANSPORT": "<CAIRN_TRANSPORT>",
        "CAIRN_LLM_BACKEND": "<CAIRN_LLM_BACKEND>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "cairn-mcp": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/jasondostal/cairn-mcp:0.21.2"
      ],
      "env": {
        "CAIRN_DB_HOST": "<CAIRN_DB_HOST>",
        "CAIRN_DB_PASS": "<CAIRN_DB_PASS>",
        "CAIRN_TRANSPORT": "<CAIRN_TRANSPORT>",
        "CAIRN_LLM_BACKEND": "<CAIRN_LLM_BACKEND>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
CAIRN_DB_HOST
Required		PostgreSQL host (pgvector)
CAIRN_DB_PASS
Required, secret		PostgreSQL password
CAIRN_TRANSPORT
Optional		Transport mode: stdio or http
CAIRN_LLM_BACKEND
Optional		LLM backend for enrichment: bedrock or ollama

Details

Packageghcr.io/jasondostal/cairn-mcp:0.21.2 (OCI, stdio)
First published11 Feb 2026
Last updated11 Feb 2026
Registry nameio.github.jasondostal/cairn-mcp

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