Cathedral MCP Server: Install & Setup

Install Cathedral in Claude Code

Remote URL

Claude Code

claude mcp add --transport http cathedral-persistent-memory-for-ai-agent https://cathedral-ai.com/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "cathedral-persistent-memory-for-ai-agent": {
      "url": "https://cathedral-ai.com/mcp"
    }
  }
}

PyPI (uv)

Claude Code

claude mcp add cathedral-persistent-memory-for-ai-agent -e CATHEDRAL_API_KEY=... -- uvx cathedral-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "cathedral-persistent-memory-for-ai-agent": {
      "command": "uvx",
      "args": [
        "cathedral-mcp"
      ],
      "env": {
        "CATHEDRAL_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Cathedral MCP server do?

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

Is the Cathedral MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Cathedral run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Cathedral to Claude Code?

Run: claude mcp add --transport http cathedral-persistent-memory-for-ai-agent https://cathedral-ai.com/mcp

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