Cathedral — Persistent Memory for AI Agents

Remote (streamable-http)

https://cathedral-ai.com/mcp Requires auth (checked 2026-09-24)

Claude Code:

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

Or add to your MCP client config:

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

• Authorization secret

Package (pypi 1.1.0)

uvx cathedral-mcp

Or add to your MCP client config:

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

• 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