Cathedral — Persistent Memory for AI Agents

MCP server · by AILIFE1

Knowledge & Memory PythonStreamable HTTP v1.1.0

Persistent memory and drift detection for AI agents across session restarts.

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Install

Pin version registry version 1.1.0

Python
uvx cathedral-mcp

Python
uvx cathedral-mcp@1.1.0

Streamable HTTP
https://cathedral-ai.com/mcp

Setup by client

Pick your client — the config below is generated for this server (both local and hosted-endpoint forms). Copy respects the “Pin version” switch above.

claude_desktop_config.json

{
  "mcpServers": {
    "cathedral-mcp": {
      "command": "uvx",
      "args": [
        "cathedral-mcp"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "<YOUR_CATHEDRAL_API_KEY>"
      }
    }
  }
}

{
  "mcpServers": {
    "cathedral-mcp": {
      "command": "uvx",
      "args": [
        "cathedral-mcp@1.1.0"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "<YOUR_CATHEDRAL_API_KEY>"
      }
    }
  }
}

Remote (hosted) endpoint

https://cathedral-ai.com/mcp

Claude Desktop: Settings → Connectors → Add custom connector, paste this URL, and provide: Authorization.

Format verified against the official Claude Desktop docs ↗.

terminal

claude mcp add --env CATHEDRAL_API_KEY=<YOUR_CATHEDRAL_API_KEY> cathedral-mcp -- uvx cathedral-mcp

claude mcp add --env CATHEDRAL_API_KEY=<YOUR_CATHEDRAL_API_KEY> cathedral-mcp -- uvx cathedral-mcp@1.1.0

terminal

claude mcp add --transport http cathedral-mcp https://cathedral-ai.com/mcp --header "Authorization: Bearer <YOUR_AUTHORIZATION>"

Format verified against the official Claude Code docs ↗.

.cursor/mcp.json

{
  "mcpServers": {
    "cathedral-mcp": {
      "command": "uvx",
      "args": [
        "cathedral-mcp"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "<YOUR_CATHEDRAL_API_KEY>"
      }
    }
  }
}

{
  "mcpServers": {
    "cathedral-mcp": {
      "command": "uvx",
      "args": [
        "cathedral-mcp@1.1.0"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "<YOUR_CATHEDRAL_API_KEY>"
      }
    }
  }
}

.cursor/mcp.json (hosted endpoint)

{
  "mcpServers": {
    "cathedral-mcp": {
      "url": "https://cathedral-ai.com/mcp",
      "headers": {
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Format verified against the official Cursor docs ↗.

.vscode/mcp.json

{
  "servers": {
    "cathedral-mcp": {
      "command": "uvx",
      "args": [
        "cathedral-mcp"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "<YOUR_CATHEDRAL_API_KEY>"
      }
    }
  }
}

{
  "servers": {
    "cathedral-mcp": {
      "command": "uvx",
      "args": [
        "cathedral-mcp@1.1.0"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "<YOUR_CATHEDRAL_API_KEY>"
      }
    }
  }
}

.vscode/mcp.json (hosted endpoint)

{
  "servers": {
    "cathedral-mcp": {
      "type": "http",
      "url": "https://cathedral-ai.com/mcp",
      "headers": {
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Format verified against the official VS Code docs ↗.

mcp_config.json

{
  "mcpServers": {
    "cathedral-mcp": {
      "command": "uvx",
      "args": [
        "cathedral-mcp"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "<YOUR_CATHEDRAL_API_KEY>"
      }
    }
  }
}

{
  "mcpServers": {
    "cathedral-mcp": {
      "command": "uvx",
      "args": [
        "cathedral-mcp@1.1.0"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "<YOUR_CATHEDRAL_API_KEY>"
      }
    }
  }
}

mcp_config.json (hosted endpoint)

{
  "mcpServers": {
    "cathedral-mcp": {
      "serverUrl": "https://cathedral-ai.com/mcp",
      "headers": {
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Format verified against the official Windsurf docs ↗.

Environment variables

Defined in the server's official registry manifest. Required secrets are shown as <YOUR_…> placeholders in the configs above.

CATHEDRAL_API_KEY required secret — Your Cathedral API key from cathedral-ai.com
CATHEDRAL_BASE_URL — Cathedral API base URL (for self-hosted instances)
CATHEDRAL_SANITISE — Set to 1 to enable prompt injection filtering on memory content
Authorization secret header — No description provided.

GitHub

⭐ 10 stars · 最近更新于 138 天前 · MIT license

About this server

Cathedral The identity layer for AI agents. Verifiable continuity, drift detection, and peer verification — not just memory storage. Free hosted API: ai.com — no setup, no credit card, 1,000 memories free. The Problem Google ships memory. Anthropic ships memory. Cloudflare ships me…

Summary from the project README — github.com/AILIFE1/Cathedral

Distributed as Python, Streamable HTTP, listed under Knowledge & Memory. Review our MCP security guide before granting access to real data.

Frequently asked questions

What does the Cathedral — Persistent Memory for AI Agents MCP server do?

How do I install Cathedral — Persistent Memory for AI Agents?

Run the install command shown above, then paste the config for your client (Claude Desktop, Claude Code, Cursor, VS Code or Windsurf) into its MCP settings and restart the client.

Is Cathedral — Persistent Memory for AI Agents free to use?

The MCP server itself is free to install. The source is public on https://github.com/AILIFE1/Cathedral. Any third-party service it calls may require its own API key and account.

Which clients support Cathedral — Persistent Memory for AI Agents?

Any MCP-compatible client can use it, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf and custom agents.

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