Cairn MCP

Cairn is a self-hosted persistent memory platform for AI agents and humans. It allows users to store, search, and discover patterns across sessions and projects. The server provides tools to save memories with auto-enrichment, search using vector and keyword methods, recall specific memory content, and manage behavioral guardrails and epistemic state.

Package and access

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

Community listingLocal stdioSource reviewed; not executedPublished by jasondostal

Vendor documentation

Checks and signals

Each line is separate evidence, not a trust score.

Popularity 7 GitHub stars

What you can do with it

Store a memory with auto-enrichment
Search memories using vector and keyword filters
Recall full content for specific memory IDs
Load behavioral guardrails for agents

Source and maintenance

Community listingRegistry 0.21.2GPL-3.0Repository archived

mcp-registry: io.github.jasondostal/cairn-mcp@0.21.2 Source repository

Last repository push: Jun 19, 2026, 3:21 AM UTC
Latest release: v0.80.0
Maintenance checked: Nov 2, 2026, 3:20 PM UTC

Packages and installation

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

ghcr.io/jasondostal/cairn-mcp:0.21.2

oci

ghcr.io/jasondostal/cairn-mcp:0.21.2 package definition

{
  "transport": "stdio",
  "identifier": "ghcr.io/jasondostal/cairn-mcp:0.21.2",
  "registryType": "oci",
  "environmentVariables": [
    {
      "name": "CAIRN_DB_HOST",
      "isRequired": true,
      "description": "PostgreSQL host (pgvector)"
    },
    {
      "name": "CAIRN_DB_PASS",
      "isRequired": true,
      "description": "PostgreSQL password"
    },
    {
      "name": "CAIRN_TRANSPORT",
      "default": "stdio",
      "description": "Transport mode: stdio or http"
    },
    {
      "name": "CAIRN_LLM_BACKEND",
      "default": "ollama",
      "description": "LLM backend for enrichment: bedrock or ollama"
    }
  ]
}

Tools

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

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 2, 2026, 3:20 PM UTC · repository · passed · metadata changed · updated
Nov 2, 2026, 3:20 PM UTC · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

Connect from your client

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

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Cursor

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

Cursor configuration

{
  "mcpServers": {
    "cairn-mcp-0-21-2": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "CAIRN_DB_HOST=<YOUR_CAIRN_DB_HOST>",
        "-e",
        "CAIRN_DB_PASS=<YOUR_CAIRN_DB_PASS>",
        "-e",
        "CAIRN_TRANSPORT=<YOUR_CAIRN_TRANSPORT>",
        "-e",
        "CAIRN_LLM_BACKEND=<YOUR_CAIRN_LLM_BACKEND>",
        "ghcr.io/jasondostal/cairn-mcp:0.21.2"
      ],
      "env": {
        "CAIRN_DB_HOST": "<YOUR_CAIRN_DB_HOST>",
        "CAIRN_DB_PASS": "<YOUR_CAIRN_DB_PASS>",
        "CAIRN_TRANSPORT": "<YOUR_CAIRN_TRANSPORT>",
        "CAIRN_LLM_BACKEND": "<YOUR_CAIRN_LLM_BACKEND>"
      }
    }
  }
}

Cline

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

Cline configuration

{
  "mcpServers": {
    "cairn-mcp-0-21-2": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "CAIRN_DB_HOST=<YOUR_CAIRN_DB_HOST>",
        "-e",
        "CAIRN_DB_PASS=<YOUR_CAIRN_DB_PASS>",
        "-e",
        "CAIRN_TRANSPORT=<YOUR_CAIRN_TRANSPORT>",
        "-e",
        "CAIRN_LLM_BACKEND=<YOUR_CAIRN_LLM_BACKEND>",
        "ghcr.io/jasondostal/cairn-mcp:0.21.2"
      ],
      "env": {
        "CAIRN_DB_HOST": "<YOUR_CAIRN_DB_HOST>",
        "CAIRN_DB_PASS": "<YOUR_CAIRN_DB_PASS>",
        "CAIRN_TRANSPORT": "<YOUR_CAIRN_TRANSPORT>",
        "CAIRN_LLM_BACKEND": "<YOUR_CAIRN_LLM_BACKEND>"
      }
    }
  }
}

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": {
    "cairn-mcp-0-21-2": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "CAIRN_DB_HOST=<YOUR_CAIRN_DB_HOST>",
        "-e",
        "CAIRN_DB_PASS=<YOUR_CAIRN_DB_PASS>",
        "-e",
        "CAIRN_TRANSPORT=<YOUR_CAIRN_TRANSPORT>",
        "-e",
        "CAIRN_LLM_BACKEND=<YOUR_CAIRN_LLM_BACKEND>",
        "ghcr.io/jasondostal/cairn-mcp:0.21.2"
      ],
      "env": {
        "CAIRN_DB_HOST": "<YOUR_CAIRN_DB_HOST>",
        "CAIRN_DB_PASS": "<YOUR_CAIRN_DB_PASS>",
        "CAIRN_TRANSPORT": "<YOUR_CAIRN_TRANSPORT>",
        "CAIRN_LLM_BACKEND": "<YOUR_CAIRN_LLM_BACKEND>"
      }
    }
  }
}

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": {
    "cairn-mcp-0-21-2": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "CAIRN_DB_HOST=<YOUR_CAIRN_DB_HOST>",
        "-e",
        "CAIRN_DB_PASS=<YOUR_CAIRN_DB_PASS>",
        "-e",
        "CAIRN_TRANSPORT=<YOUR_CAIRN_TRANSPORT>",
        "-e",
        "CAIRN_LLM_BACKEND=<YOUR_CAIRN_LLM_BACKEND>",
        "ghcr.io/jasondostal/cairn-mcp:0.21.2"
      ],
      "env": {
        "CAIRN_DB_HOST": "<YOUR_CAIRN_DB_HOST>",
        "CAIRN_DB_PASS": "<YOUR_CAIRN_DB_PASS>",
        "CAIRN_TRANSPORT": "<YOUR_CAIRN_TRANSPORT>",
        "CAIRN_LLM_BACKEND": "<YOUR_CAIRN_LLM_BACKEND>"
      }
    }
  }
}

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