What is the key difference between Agentcairn and Vault Cortex?

Agentcairn belongs to the Knowledge & Memory category with local stdio execution, while Vault Cortex belongs to the Knowledge & Memory category with local stdio execution.

How do I install Agentcairn or Vault Cortex in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Agentcairn and Vault Cortex free or paid?

Agentcairn operates under a Free / Open Source model (No auth required). Vault Cortex operates under a Free / Open Source model (OAuth 2.0).

Which MCP server has more tools and community activity?

Agentcairn lists 6 tools with 2 views and 55 GitHub stars. Vault Cortex lists 6 tools with 2 views and 19 GitHub stars.

Can I use both Agentcairn and Vault Cortex together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Agentcairn vs Vault Cortex

In-depth architectural comparison of the Agentcairn and Vault Cortex MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Agentcairn

Knowledge & Memory · Local stdio

Quality: 49/100 (Fair) | Auth: No auth required

Vault Cortex

Knowledge & Memory · Local stdio

Quality: 44/100 (Fair) | Auth: OAuth 2.0

Verdict Summary: Choose Agentcairn if you need specialized Knowledge & Memory tools running via a local process. Choose Vault Cortex if your workspace requires Knowledge & Memory integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Agentcairn when:

You need dedicated capabilities in the Knowledge & Memory domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Plain Markdown Obsidian vault as canonical memory store, Rebuildable DuckDB index for hybrid BM25, vector, and graph recall, Non-lossy memory capture with supersession and secret redaction.

Explore Agentcairn Details

Choose Vault Cortex when:

You need dedicated capabilities in the Knowledge & Memory domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: OAuth 2.0 (Free / Open Source).
You have access to required keys: VAULT_CORTEX_OAUTH_CLIENT_ID, VAULT_CORTEX_OAUTH_CLIENT_SECRET, VAULT_CORTEX_VAULT_PATH, VAULT_CORTEX_SERVER_PORT.

Feature & Specification Comparison

Specification	Agentcairn ccf Knowledge & Memory	Vault Cortex aliasunder Knowledge & Memory
Summary
Category & Scope	Knowledge & Memory	Knowledge & Memory
Quality signal

Tools & Capabilities Breakdown

Agentcairn Tools (6)

Plain Markdown Obsidian vault as canonical memory store

Rebuildable DuckDB index for hybrid BM25, vector, and graph recall

Non-lossy memory capture with supersession and secret redaction

Cross-agent shared vault for consistent context

Memory provenance, currency, and importance metadata

Integration with Claude Code, Codex, Cursor, and MCP hosts

Vault Cortex Tools (6)

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Agentcairn Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "ccf-agentcairn": {
      "command": "uvx",
      "args": [
        "agentcairn"
      ]
    }
  }
}

Vault Cortex Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "aliasunder-vault-cortex": {
      "command": "npx",
      "args": [
        "-y",
        "vault-cortex@latest"
      ],
      "env": {
        "VAULT_CORTEX_OAUTH_CLIENT_ID": "YOUR_VAULT_CORTEX_OAUTH_CLIENT_ID_HERE",
        "VAULT_CORTEX_OAUTH_CLIENT_SECRET": "YOUR_VAULT_CORTEX_OAUTH_CLIENT_SECRET_HERE",
        "VAULT_CORTEX_VAULT_PATH": "YOUR_VAULT_CORTEX_VAULT_PATH_HERE",
        "VAULT_CORTEX_SERVER_PORT": "YOUR_VAULT_CORTEX_SERVER_PORT_HERE"
      }
    }
  }
}

Frequently Asked Questions

Agentcairn is categorized under Knowledge & Memory and uses a local stdio subprocess. In contrast, Vault Cortex belongs to Knowledge & Memory using local stdio subprocess. Select Agentcairn when you need capabilities focused on knowledge & memory and Vault Cortex when you require tools for knowledge & memory.

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