Hatchdoor vs Obsidian Codex MCP

In-depth architectural comparison of the Hatchdoor and Obsidian Codex MCP 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.

Which MCP Server Should You Choose?

H

Choose Hatchdoor when:

• You need dedicated capabilities in the Knowledge & Memory domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: MCP access for reading and modifying Markdown notes, Keyword and semantic search, Multi-vault hosting with separate agent scopes.

Explore Hatchdoor Details

Choose Obsidian Codex MCP 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).
• You have access to required keys: OBSIDIAN_VAULT_PATH, OBSIDIAN_READ_ONLY, OBSIDIAN_BACKUP_ON_WRITE.
• Primary tools included: configure_vault, get_note, create_note.

Feature & Specification Comparison

Specification	H Hatchdoor Knowledge & Memory	Obsidian Codex MCP dot-RealityTest Knowledge & Memory
Summary	Self-host your Obsidian vaults: a web UI for you, MCP for your AI agents. No Obsidian, no plugins.	Local-first Obsidian vault MCP server for Codex, Claude Desktop, and other MCP clients. Works directly with markdown files, no Obsidian plugin, API key, cloud service, or running Obsidian app required. Includes read-only mode, backup-on-write, path isolation, and setup examples.
Category & Scope	Knowledge & Memory

Tools & Capabilities Breakdown

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).

{
  "mcpServers": {
    "hatchdoor": {
      "url": "http://127.0.0.1:42824/mcp"
    }
  }
}

{
  "mcpServers": {
    "dot-realitytest-obsidian-codex-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "dot-realitytest-obsidian-codex-mcp"
      ],
      "env": {
        "OBSIDIAN_VAULT_PATH": "YOUR_OBSIDIAN_VAULT_PATH_HERE",
        "OBSIDIAN_READ_ONLY": "YOUR_OBSIDIAN_READ_ONLY_HERE",
        "OBSIDIAN_BACKUP_ON_WRITE": "YOUR_OBSIDIAN_BACKUP_ON_WRITE_HERE"
      }
    }
  }
}

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